Synthesis and crystal structure of two copper(II) complexes with coordinated decavanadate ion

Two new compounds containing decavanadate ions coordinated to copper centers, (2-hepH(+))(2)[{Cu (H2O)(2)(O,N-2-hep)}(2)V10O28]center dot 6H(2)O (2-hepH(+) = 2-(2-hydroxyethyl)pyridinium; 2-hep = 2-(2-hydroxyethyl) pyridine) (1), [{Cu(2-amp)(2)(H2O)}(2)H2V10O28]center dot 4H(2)O (amp = 2-(aminomethyl)pyridine) (2), have been prepared and characterized by elemental analyses and IR spectroscopy. The structure of 1 consists of trinuclear units [{Cu(H2O)(2)(O,N-2-hep)}(2)V10O28](2-), 2-hepH(+) cations and molecules of water of crystallization. A trinuclear unit [{Cu(2-amp)(2)(H2O)}(2)H2V10O28] is a principal part also in the structure of 2, but the bonds of decavanadate group to the copper complexes are much weaker than in 1. (C) 2011 Elsevier Ltd. All rights reserved.