The Formation of a Hydrogencarbonato-bridged Dinuclear Copper(II) Complex by Fixation and Activation of Atmospheric CO2

The first hydrogencarbonato-bridged dinuclear copper(II) complex [Cu2(L)(HCO3)](BF4)2·5H2O, 1 was obtained by allowing of acetone solution containing a copper(II) complex [Cu2(L)(OH)](BF4)2·6H2O, where HL is N,N,Nʹ,Nʹ-tetrakis[(1-methyl-2benzimidazolyl)methyl]-2-hydroxy-1,3-diaminopropane. The crystal structure of 1 was determined by X-ray crystallography and characterized by the magnetic susceptibility and infrared and visible absorption spectrum.