THE FORMATION OF MONOMETHYL CARBONATE-BRIDGED DINUCLEAR NICKEL(II) COMPLEXES BY AN EFFICIENT CO2 UPTAKE IN METHANOL CONTAINING UREA DERIVATIVES

Monomethyl carbonate-bridged dinuclear nickel(II) complexes [Ni-2(L)(O OC-O-CH3)(CH3OH)(2)](ClO4)(2) . H2O . CH3OH, 1 and [Ni-2(L)(OOC-O-CH3) (H2O)(2)](ClO4)(2) . H2O, 2 were obtained in the presence of [Ni-2(L)( OH)(H2O)(2)](ClO4)(2) and N-methylurea at room temperature in air, whe re HL is ,N',N'-tetrakis[(1-ethyl-2-benzimidazolyl)methyl]- 2-hydroxy- 1,3-diaminopropane. The crystal structure of 1 was determined by X-ray crystallography and 2 was characterized by the magnetic susceptibilit y and visible absorption spectrum.