Ring opening complexation of nickel(II) and copper(II) by 2-phenyl-2-(2-pyridyl)imidazolidine: Synthesis, spectra and X-ray crystal structures

Abstract

The cyclic structure of 2-phenyl-2-(2-pyridyl)imidazolidine ( 1) derived from the condensation of 1,2-diaminoethane and 2-benzoylpyridine has been confirmed by X-ray crystallography. Reaction of ( 1) with salts of nickel(II) and copper(II) leads to metal induced ring opening and the formation of complexes containing the tridentate ligand (L). The formulae of the complexes derived from NiX 2 and CuX 2 are [NiL 2]X 2 and [CuLY]X 2 (X= ClO 4 - , Y = H 2O, CH 3CN and N 3 - ). Crystal structures were obtained for ( 1), [NiL 2][ClO 4] 2, [CuL(CH 3CN)][ClO 4] 2, [CuL(H 2O)][NO 3] 2 and [CuLN 3][ClO 4].