Synthesis, reactivity and some physical properties of new copper(II) complexes containing {2-(o-hydroxyphenyl) }benzoxazole moieties

Synthetic Inorganic and 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
Department of Chemistry, DDU Gorakhpur University, Gorakhpur-273 001, Uttar Pradesh, India
Manuscript received 14 July 2010, accepted 31 March 2011

A complex [(J.L-CI)₂Cu₂{ŋ²-(pbox)hl (1) has been isolated by the reaction of copper(II) chloride (hydrated) with {2-(o-hydroxyphenyl)}benzoxazole (pboxH) in equimolar ratio [in ethanolic medium] and was found to be insoluble in most of the organic solvents; resulting product was treated with sodium salts of various Schiff bases, isopropoxide and aluminium tetraisopropoxide in presence of THF/pyridine produced the complexes of the type [(smab)Cu{ŋ²-(pbox)] (2), [(sap)Cu{ŋ²-(pbox)}] (3) and [(opr1)₂Cu₂{ŋ²-(pbox)₂ (4), [{AI(opr1)₄}Cu{ŋ²-(pbox)}₂ (5). These products have been characterized by elemental analysis (C, H, N), Volhard's method (for Cl) and AAS (for Cu), melting points, spectroscopic (IR, UV-Visible, ESR, FAB-MS) and magnetic studies.