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result sql = New structural motifs in chromium(iii) calix[4 and 6]arene chemistry.
New structural motifs in chromium(iii) calix[4 and 6]arene chemistry.
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char = t;code = 116
char = ;code = 32
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char = o;code = 111
char = s;code = 115
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = r;code = 114
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char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = u;code = 117
char = m;code = 109
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char = c;code = 99
char = a;code = 97
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char = i;code = 105
char = x;code = 120
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = e;code = 101
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char = i;code = 105
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char = ,;code = 44
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char = t;code = 116
char = w;code = 119
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char = ;code = 32
char = s;code = 115
char = e;code = 101
char = t;code = 116
char = s;code = 115
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = K;code = 75
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char = +;code = 43
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char = i;code = 105
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char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = o;code = 111
char = r;code = 114
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = y;code = 121
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char = d;code = 100
char = i;code = 105
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = e;code = 101
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char = v;code = 118
char = i;code = 105
char = r;code = 114
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char = n;code = 110
char = m;code = 109
char = e;code = 101
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char = t;code = 116
char = s;code = 115
char = ;code = 32
char = t;code = 116
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char = e;code = 101
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = w;code = 119
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char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = i;code = 105
char = n;code = 110
char = a;code = 97
char = l;code = 108
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = b;code = 98
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char = d;code = 100
char = g;code = 103
char = i;code = 105
char = n;code = 110
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char = ;code = 32
char = T;code = 84
char = H;code = 72
char = F;code = 70
char = ;code = 32
char = l;code = 108
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char = a;code = 97
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char = d;code = 100
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = n;code = 110
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char = B;code = 66
char = u;code = 117
char = L;code = 76
char = i;code = 105
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = x;code = 120
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char = O;code = 79
char = H;code = 72
char = );code = 41
char = (;code = 40
char = 4;code = 52
char = );code = 41
char = ];code = 93
char = ,;code = 44
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char = f;code = 102
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
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char = t;code = 116
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char = e;code = 101
char = ;code = 32
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = r;code = 114
char = C;code = 67
char = l;code = 108
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char = 3;code = 51
char = );code = 41
char = (;code = 40
char = T;code = 84
char = H;code = 72
char = F;code = 70
char = );code = 41
char = (;code = 40
char = 3;code = 51
char = );code = 41
char = ];code = 93
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = w;code = 119
char = o;code = 111
char = r;code = 114
char = k;code = 107
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char = u;code = 117
char = p;code = 112
char = ,;code = 44
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = e;code = 101
char = x;code = 120
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char = {;code = 123
char = C;code = 67
char = r;code = 114
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char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = -;code = 45
char = C;code = 67
char = a;code = 97
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char = (;code = 40
char = O;code = 79
char = H;code = 72
char = );code = 41
char = (;code = 40
char = O;code = 79
char = );code = 41
char = (;code = 40
char = 3;code = 51
char = );code = 41
char = ];code = 93
char = (;code = 40
char = N;code = 78
char = C;code = 67
char = M;code = 77
char = e;code = 101
char = );code = 41
char = };code = 125
char = (;code = 40
char = 2;code = 50
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char = .;code = 46
char = 4;code = 52
char = M;code = 77
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char = 2;code = 50
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char = C;code = 67
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char = b;code = 98
char = l;code = 108
char = e;code = 101
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char = b;code = 98
char = o;code = 111
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char = d;code = 100
char = ,;code = 44
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = g;code = 103
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
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char = m;code = 109
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char = d;code = 100
char = a;code = 97
char = s;code = 115
char = h;code = 104
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char = O;code = 79
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char = .;code = 46
char = 5;code = 53
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char = (;code = 40
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char = O;code = 79
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char = (;code = 40
char = );code = 41
char = .;code = 46
char = ;code = 32
char = C;code = 67
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char = p;code = 112
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char = ;code = 32
char = I;code = 73
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char = e;code = 101
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char = a;code = 97
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char = C;code = 67
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char = (;code = 40
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char = ];code = 93
char = ;code = 32
char = w;code = 119
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char = t;code = 116
char = h;code = 104
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char = N;code = 78
char = a;code = 97
char = H;code = 72
char = ;code = 32
char = o;code = 111
char = r;code = 114
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char = n;code = 110
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char = i;code = 105
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char = i;code = 105
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char = a;code = 97
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char = C;code = 67
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char = T;code = 84
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char = O;code = 79
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char = 3;code = 51
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char = (;code = 40
char = N;code = 78
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char = C;code = 67
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char = T;code = 84
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char = F;code = 70
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char = (;code = 40
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char = L;code = 76
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char = M;code = 77
char = e;code = 101
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char = (;code = 40
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char = );code = 41
char = ];code = 93
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char = M;code = 77
char = e;code = 101
char = C;code = 67
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char = ;code = 32
char = (;code = 40
char = );code = 41
char = .;code = 46
char = ;code = 32
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char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
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char = o;code = 111
char = n;code = 110
char = o;code = 111
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char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
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char = y;code = 121
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char = l;code = 108
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char = g;code = 103
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char = O;code = 79
char = H;code = 72
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char = (;code = 40
char = 3;code = 51
char = );code = 41
char = (;code = 40
char = O;code = 79
char = M;code = 77
char = e;code = 101
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char = ];code = 93
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
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char = B;code = 66
char = u;code = 117
char = L;code = 76
char = i;code = 105
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char = i;code = 105
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = e;code = 101
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char = y;code = 121
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char = l;code = 108
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char = d;code = 100
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char = (;code = 40
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char = (;code = 40
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char = f;code = 102
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char = o;code = 111
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char = u;code = 117
char = p;code = 112
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char = h;code = 104
char = e;code = 101
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char = p;code = 112
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char = e;code = 101
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char = (;code = 40
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char = (;code = 40
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char = c;code = 99
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char = r;code = 114
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char = e;code = 101
char = H;code = 72
char = (;code = 40
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char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
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char = (;code = 40
char = O;code = 79
char = H;code = 72
char = );code = 41
char = (;code = 40
char = 6;code = 54
char = );code = 41
char = ];code = 93
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = N;code = 78
char = a;code = 97
char = [;code = 91
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = O;code = 79
char = t;code = 116
char = -;code = 45
char = B;code = 66
char = u;code = 117
char = );code = 41
char = (;code = 40
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char = );code = 41
char = ];code = 93
char = ;code = 32
char = (;code = 40
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = u;code = 117
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = r;code = 114
char = C;code = 67
char = l;code = 108
char = (;code = 40
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char = );code = 41
char = (;code = 40
char = T;code = 84
char = H;code = 72
char = F;code = 70
char = );code = 41
char = (;code = 40
char = 3;code = 51
char = );code = 41
char = ];code = 93
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = N;code = 78
char = a;code = 97
char = O;code = 79
char = t;code = 116
char = -;code = 45
char = B;code = 66
char = u;code = 117
char = );code = 41
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = e;code = 101
char = x;code = 120
char = ;code = 32
char = {;code = 123
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char = r;code = 114
char = C;code = 67
char = a;code = 97
char = x;code = 120
char = [;code = 91
char = 6;code = 54
char = ];code = 93
char = (;code = 40
char = O;code = 79
char = );code = 41
char = (;code = 40
char = 3;code = 51
char = );code = 41
char = (;code = 40
char = O;code = 79
char = H;code = 72
char = );code = 41
char = (;code = 40
char = 3;code = 51
char = );code = 41
char = N;code = 78
char = a;code = 97
char = (;code = 40
char = N;code = 78
char = C;code = 67
char = M;code = 77
char = e;code = 101
char = );code = 41
char = (;code = 40
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char = );code = 41
char = (;code = 40
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = -;code = 45
char = O;code = 79
char = H;code = 72
char = );code = 41
char = };code = 125
char = (;code = 40
char = 2;code = 50
char = );code = 41
char = .;code = 46
char = 4;code = 52
char = M;code = 77
char = e;code = 101
char = C;code = 67
char = N;code = 78
char = ;code = 32
char = (;code = 40
char = );code = 41
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = e;code = 101
char = x;code = 120
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = -;code = 45
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;;code = 59
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = e;code = 101
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = n;code = 110
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = S;code = 83
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = -;code = 45
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = l;code = 108
char = y;code = 121
char = m;code = 109
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = l;code = 108
char = u;code = 117
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = M;code = 77
char = A;code = 65
char = O;code = 79
char = );code = 41
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = l;code = 108
char = u;code = 117
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = l;code = 108
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = D;code = 68
char = M;code = 77
char = A;code = 65
char = C;code = 67
char = );code = 41
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = -;code = 45
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = d;code = 100
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = <;code = 60
char = o;code = 111
char = r;code = 114
char = =;code = 61
char = ;code = 32
char = 1;code = 49
char = ;code = 32
char = g;code = 103
char = ;code = 32
char = m;code = 109
char = m;code = 109
char = o;code = 111
char = l;code = 108
char = (;code = 40
char = -;code = 45
char = 1;code = 49
char = );code = 41
char = ;code = 32
char = h;code = 104
char = r;code = 114
char = (;code = 40
char = -;code = 45
char = 1;code = 49
char = );code = 41
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = r;code = 114
char = (;code = 40
char = -;code = 45
char = 1;code = 49
char = );code = 41
char = );code = 41
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
result sql = The reactions of either p-tert-butylcalix[4]areneH(4) [Cax(OH)(4)], 1,3-dimethoxy-p-tert-butylcalix[4]areneH(2) [Cax(OH)(2)(OMe)(2)] or p-tert-butylcalix[6]areneH(6) [Cax[6](OH)(6)] with alkali metal cations and the chromium complexes [CrCl(3)(THF)(3)] or [CrCl(2)(THF)] (THF = tetrahydrofuran) are described. In particular, the treatment of [Cax(OH)(4)] with in situ generated M[Cr(Ot-Bu)(4)] (M = Li or K) affords, after work-up, the complex {[CrCax(O)(4)(NCMe)](2)[Li(THF)](2)[Li(NCMe)](2)Cl(2)(micro(4)-O)}.2.25(MeCN) and two forms of {K(MeCN)(x)[CrCax(O)(4)(NCMe)][CrCax(OH)(O)(3)(NCMe)]}.MeCN (x = 3 or 4) , respectively. The potassium salt of [Cax(OH)(4)] reacts with [CrCl(2)(THF)] to afford a highly sensitive complex, which on exposure to air gives rise to the compound {[CrCax(O)(4)K(THF)(2)](2)H(micro-O)(H(2)O)K(THF)(H(2)O)(micro-THF)}(2).6THF , that possesses four chromium calixarene units, two sets of K(+) ions that are coordinated in two very different environments together with terminal and bridging THF ligands. The reaction of n-BuLi with [Cax(OH)(4)], followed by the addition of [CrCl(3)(THF)(3)] affords, after work-up, the complex {Cr[micro-Cax(OH)(O)(3)](NCMe)}(2).4Me(2)C[double bond, length as m-dash]O.0.5H(2)O (). Complex is also available via the hydrolysis of complex . Interaction of [Cax(OH)(2)(OMe)(2)] with NaH or n-BuLi in THF affords, following the addition of [CrCl(3)(THF)(3)], the demethylated dimer {Cr[micro-Cax(OH)(O)(3)](NCMe)}(2).4MeCN (), which is a different solvate of , or the monomeric salt {Cax(O)(2)(OMe)(2)CrCl(2)[Li(NCMe)(2)]}.2MeCN (), respectively. The reaction of 1,3-dipropoxy-p-tert-butylcalix[4]areneH(2), [Cax(OH)(2)(On-Pr)(2)], with n-BuLi followed by [CrCl(3)(THF)(3)] affords the monomeric complex [CrCl(2)Cax(O)(2)(On-Pr)(2)Li(NCMe)(2)].3MeCN (). Interaction of the mono-methoxy ligand [Cax(OH)(3)(OMe)] with n-BuLi in diethyl ether followed by addition of [CrCl(3)(THF)(3)] in THF affords, upon work-up, the complex [CrCax(OMe)(O)(3)(NCMe)](2).MeCN (). Interaction of p-tert-butylcalix[6]areneH(6) [Cax[6](OH)(6)] with Na[Cr(Ot-Bu)(4)] (formed in situ from [CrCl(3)(THF)(3)] and excess NaOt-Bu) affords the complex {CrCax[6](O)(3)(OH)(3)Na(NCMe)(2)(micro-OH)}(2).4MeCN (). Complexes - have been structurally characterised; for and , it was necessary to use synchrotron radiation. Screening of - for ethylene polymerisation using either methylaluminoxane (MAO) or dimethylaluminium chloride (DMAC) as co-catalyst afforded only very poor catalytic activities (

Publication: Dalton Trans 2009 Feb 21 ;(7)::1231-42. :doi: 10.1039/b813313a.
Publication Date: 2009 Feb 21
Study Author(s): Redshaw, Carl;Homden, Damien;Hughes, David L;Wright, Joseph A;Elsegood, Mark R J;
Institution: Energy Materials Laboratory, School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, UK NR4 7TJ. [email protected]
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The reactions of either p-tert-butylcalix[4]areneH(4) [Cax(OH)(4)], 1,3-dimethoxy-p-tert-butylcalix[4]areneH(2) [Cax(OH)(2)(OMe)(2)] or p-tert-butylcalix[6]areneH(6) [Cax[6](OH)(6)] with alkali metal cations and the chromium complexes [CrCl(3)(THF)(3)] or [CrCl(2)(THF)] (THF = tetrahydrofuran) are described. In particular, the treatment of [Cax(OH)(4)] with in situ generated M[Cr(Ot-Bu)(4)] (M = Li or K) affords, after work-up, the complex {[CrCax(O)(4)(NCMe)](2)[Li(THF)](2)[Li(NCMe)](2)Cl(2)(micro(4)-O)}.2.25(MeCN) and two forms of {K(MeCN)(x)[CrCax(O)(4)(NCMe)][CrCax(OH)(O)(3)(NCMe)]}.MeCN (x = 3 or 4) , respectively. The potassium salt of [Cax(OH)(4)] reacts with [CrCl(2)(THF)] to afford a highly sensitive complex, which on exposure to air gives rise to the compound {[CrCax(O)(4)K(THF)(2)](2)H(micro-O)(H(2)O)K(THF)(H(2)O)(micro-THF)}(2).6THF , that possesses four chromium calixarene units, two sets of K(+) ions that are coordinated in two very different environments together with terminal and bridging THF ligands. The reaction of n-BuLi with [Cax(OH)(4)], followed by the addition of [CrCl(3)(THF)(3)] affords, after work-up, the complex {Cr[micro-Cax(OH)(O)(3)](NCMe)}(2).4Me(2)C[double bond, length as m-dash]O.0.5H(2)O (). Complex is also available via the hydrolysis of complex . Interaction of [Cax(OH)(2)(OMe)(2)] with NaH or n-BuLi in THF affords, following the addition of [CrCl(3)(THF)(3)], the demethylated dimer {Cr[micro-Cax(OH)(O)(3)](NCMe)}(2).4MeCN (), which is a different solvate of , or the monomeric salt {Cax(O)(2)(OMe)(2)CrCl(2)[Li(NCMe)(2)]}.2MeCN (), respectively. The reaction of 1,3-dipropoxy-p-tert-butylcalix[4]areneH(2), [Cax(OH)(2)(On-Pr)(2)], with n-BuLi followed by [CrCl(3)(THF)(3)] affords the monomeric complex [CrCl(2)Cax(O)(2)(On-Pr)(2)Li(NCMe)(2)].3MeCN (). Interaction of the mono-methoxy ligand [Cax(OH)(3)(OMe)] with n-BuLi in diethyl ether followed by addition of [CrCl(3)(THF)(3)] in THF affords, upon work-up, the complex [CrCax(OMe)(O)(3)(NCMe)](2).MeCN (). Interaction of p-tert-butylcalix[6]areneH(6) [Cax[6](OH)(6)] with Na[Cr(Ot-Bu)(4)] (formed in situ from [CrCl(3)(THF)(3)] and excess NaOt-Bu) affords the complex {CrCax[6](O)(3)(OH)(3)Na(NCMe)(2)(micro-OH)}(2).4MeCN (). Complexes - have been structurally characterised; for and , it was necessary to use synchrotron radiation. Screening of - for ethylene polymerisation using either methylaluminoxane (MAO) or dimethylaluminium chloride (DMAC) as co-catalyst afforded only very poor catalytic activities (
PMID: 19322496

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