Bimetallic multidimensional supramolecular coordination polymers containing triphenyltin cation and CuCN

Abstract

The reaction of K 3[Cu(CN) 4] in H 2O with a solution of Ph 3SnCl and 4-methylpyrimidine (mpym) in acetonitrile affords, at room temperature, the white powder [(Ph 3Sn) 3Cu(CN) 4.mpym·H 2O], II, precipitating in the mother liquor and colourless platelet crystals [(Ph 3Sn) 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-Ph 3Sn)-CN] chains forming waves where the CNSnPh 3 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; -C N→Sn(Ph 3)←O(H)H…N C– and –C N→Sn(Ph 3)–N(mpym)N–Sn(Ph 3)←N C– creating super-Prussian blue 3D-network structure.