Co(II), Ni(II) and Cu(II) Chelates of Bis-9,10-Phenanthro-quinonedioxime and their Nitrogen-Donor adducts with NH3 and Pyridine

Abstract

Metal chelates of 9,10-phenanthroquinonedioxime with Co(ll),
Ni(II) and Cu(II) of the types M(HL)₂ [M = Co(Il), Ni(II) and
Cu(II)l, H₂L = 9, 10-phenanthroquinonedioxime where H = dissociable
oximato proton have been synthesised by allowing ethanolic
solutions of metal salts to react with solution of the ligand in
tetrahydrofuran in the molar ratio 1 : 2. They produce another series
of metal chelates of the type [M(HL)₂X₂] (X = NH₃ or pyridine)
when their solution was treated with ammonia or pyridine. I,R
spectrum suggests coordination of the ligand with metal ions
through azomethime nitrogen in bidentate manner. Electronic
spectral and magnetic moment studies indicate complexes of the
type [M(HL)₂] to be square planar and those of the type
[M(HL)₂X₂] to be octahedral in nature.