Bimetallic multidimensional supramolecular coordination polymers containing triphenyltin cation and CuCN

The reaction of K3[Cu(CN)4] in H2O with a solution of Ph3SnCl and 4-methylpyrimidine (mpym) in acetonitrile affords, at room temperature, the white powder [(Ph3Sn)3Cu(CN)4.mpym·H2O], II, precipitating in the mother liquor and colourless platelet crystals [(Ph3Sn)2Cu(CN)3], I, which was obtained from the filterate after two days. The copper site in I assumes distorted trigonal plane geometry. The network structure of I is constructed via 3D-puckered layers constructed of infinite parallel [CuCN-(μ-Ph3Sn)-CN] chains forming waves where the CNSnPh3 fragments locate the peak and bottom positions of the waves as side arms. The 2D-layers are connected by hydrogen bonds and π–π stacking. This is the first example for a Cu-coordination polymer containing the tetrahedral and bipyramidal configured tin atoms. The pyramidal tetrahedral [Cu(CN)4]3− anion, in II, are interconnected by two kinds of nanometer spacers; -CN→Sn(Ph3)←O(H)H…NC– and –CN→Sn(Ph3)–N(mpym)N–Sn(Ph3)←NC– creating super-Prussian blue 3D-network structure.

The reaction of K3[Cu(CN)4] in H2O with a solution of Ph3SnCl and 4-methylpyrimidine (mpym) in acetonitrile affords, at room temperature, the white powder [(Ph3Sn)3Cu(CN)4.mpym·H2O], II, precipitating in the mother liquor and colourless platelet crystals [(Ph3Sn)2Cu(CN)3], I, which was obtained from the filtrate after two days. The copper site in I assumes trigonal bipyramidal configuration. The network structure of I is constructed via 3D-puckered layers constructed of infinite parallel [CuCN–(μ-Ph3Sn)–CN] chains forming waves where the CNSnPh3 fragments locate the peak and bottom positions of the waves as side arms.Figure optionsDownload as PowerPoint slide