Synthetic lnorg. Metallo-Organic Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India E-mail : rajalkoxy@yahoo.com Department of Chemistry, R. J. College, Ghatkopar, Mumbai-400 086, India Manuscript received 13 November 2006, revised 10 April 2007, accepted 12 April 2007 A complex of cobalt(II); ((µ-Cl)2Co2{ɳ2-(pbox)}2] (1), (where pbox = {2-(o-hydroxyphenyl)benzoxazole}, has been synthesized, and it was treated with sodium salts of

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... f bases, Na(sb) [sb = smab and sap], isopropoxo-aryloxoNa( OR) [R = Pri and Ar] and tetraisopropoxyaluminate, Na{Al(OPri)4} to produce hydrocarbon soluble complexes of the types : [(smab)Co{ɳ2-(pbox)}] (2), [(sap)Co{ɳ2·(pbox)}] (3), [(µ-OPri) 2Co2{ɳ2-(pbox)}2] (4), [(µ-OAr)2Co2{ɳ2-(pbox)}2] (5) and [(µ-OPri)2{Al(OPri)2}Co{ɳ2-(pbox)}2] (6). These complexes have been characterized by elemental analysis, IR, electronic, FAB-mass and magnetic susceptibility measurements, which suggest tetrahedral geometry of the molecule before coordination of solvent (THF) molecules.