Synthesis of binuclear monohydroxo bridged copper (II) complexes with 1,10-phenanthroline and 4,4 -dimethyl - 2,2 - bipyrdine

Tow new compound of type [(chelate) 2Cu-OH-Cu (chelate) 2]X3. nH2O, where chelate=1, 10-phenanthroline; X=Cl- (n=3. 5) and chelate=4, 4إ-dimethyl-2, 2إ-bipyridine; X=ClO-4 (n=5) have been synthesised and theirproperties investigated. The complexes show room temperature magnetic momentorder of 1. 0 B. M. per copper atom. The X-band ESR spectrum of powderedsamples at room temperature shows typical Dm=1 transition at gav=2. 075 for1, 10-phenanthroline and gav=2. 085 for 4, 4إ-dimethyl-2, 2إ-bipyridine, and muchweaker Dm=2 transition at half-field which is the characteristic of dimeric unit.