Two-dimensional metamagnet composed of cyano-bridged CuII–WV bimetallic assembly

Two-dimensional cyanide-bridged copper(II) octacyanotungstates(V), [{Cu(3-CNpy)2(H2O)}2 {Cu(3-CNpy)2(H2O)2}{W(CN)8}2](3-CNpy = 3-cyanopyridine)(1) and [{Cu(4-CNpy)2}2{Cu(4-CNpy) 2(H2O)2}{W(CN)8}2]·6H2O (4-CNpy = 4-cyanopyridine)(2), were prepared and these compounds exhibited metamagnetic behavior with Néel temperatures of 8.0 K (1) and 4.4 K (2).