Hydrothermal synthesis and structure of a new arsenic–vanadium cluster: [NH2(CH2CH2)2NH2]3[As8V14O42(SO4)]$6.5H2O

A new arsenic–vanadium clusters, [NH2(CH2CH2)2NH2]3[As8V14O42(SO4)]$6.5H2O (1), have been hydrothermally synthesized and characterized by IR, elemental analysis, TGA, magnetic property, and single crystal X-ray diffraction analysis. Crystal data: Monoclinic, P2(1)/n, aZ21.963(2) A ° , bZ14.508(1) A ° , cZ23.054(3) A ° , bZ118.316(3)8, ZZ4. X-ray crystallographic study showed that crystal 1 is composed of the discrete cluster anions [As8V14O42(SO4)]6K, organic amine molecules providing charge-compensation, space-filling, and structure-directing roles, and lattice water molecules occupying in the structure. The study of the magnetic susceptibility of 1 demonstrates the presence of antiferromagnetic interaction between VIV cations in 1. q 2004 Elsevier B.V. All rights reserved