Abstract

The structure and magnetic properties of two hybrid VPO compounds [(Cu 2bipy 2) 2V 4O 11(PO 4) 2]·5H 2O 1 and [Cu 2phen 2(O 3PCH 2PO 3)(V 2O 5)(H 2O)]·H 2O 2 are reported. The magnetic behaviour of compound 1 can be described with the DFT calculated magnetic exchange constants, J 1=+4.93 cm -1, J 2=-0.63 cm -1, J 3=-24.2 cm -1. Compound 2 presents intradimeric antiferromagnetism with J 1=-30 cm -1, and interdimeric antiferromagnetism with J 2=-8.5 cm -1. © 2006 Elsevier B.V. All rights reserved.