Dimorphosim of a dimethoxy bridged oxovanadium(V)-hydrazone complex

Department of Chemistry, Ramakrishna Mission Vivekananda Centenary College, Rahara,

Kolkata-700 118, India

E-mail : ictg_64@yahoo.co.in

Department of Chemistry, The University of Reading, P.O. Box 224, Whiteknights, Reading RG6 6AD, UK

Manuscript received 12 June 2009, revised 9 September 2009. accepted 14 September 2009

A monoclinic variety with C2/c space group of tile title complex [V^vO(L)(OCH₃)₂ incorporating the doubly deprotonated benzoyl hydrazone of 2-hydroxy-S-methylacetophenone (H₂L) was synthesized from the decomposition of [V^IVO(L)(bipy)] (where bipy representing the 2,2'-bipyridine) in methanol which has been reported very recently from our laboratory. In this paper we report another monoclinic variety of this complex with P2 ₁/n space group that showed some differences in bonding patterns in the solid state (but in solution they are almost identical) prepared by different synthetic method viz. from the equimolar reaction of [V^IVO(acac)₂], H₂L and imidazole in CH₃OH.