Author: Liu Ying-Fan Zhao Dong Sun Yu-An Yang Rui-Na Fu Peng-Fei
Publisher: Taylor & Francis Ltd
ISSN: 0095-8972
Source: Journal of Coordination Chemistry, Vol.58, Iss.4, 2005-03, pp. : 301-308
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Abstract
A novel binuclear complex [Cu 2 (PPh 3 ) 6 (μ-OOCH)](ClO 4 ) ( II ) was synthesized via the interaction of carbon dioxide with [Cu(PPh 3 ) 2 (BH 4 )] ( I ) in the presence of PPh 3 and NBu 4 (ClO 4 ). It was characterized by elemental analysis and spectroscopic methods as well as by single-crystal X-ray diffraction. Crystals are monoclinic, space group C 2 / c , with a = 25.911(5), b = 13.6361(3), c = 26.929(5) Å, β = 90.21(3)°, V = 9323.1(3) Å 3 , Z = 8 and D c = 1.314 g cm −3 . The formate ligand of II in the solid state displays a near-perfect linear coordination mode as CO 2 and serves as a bridge for the two Cu(PPh 3 ) 3 units with the O-C-O bond angle being 180.0(5)°. A mechanism involving carbon dioxide insertion into the Cu-H bond of [Cu(PPh 3 ) 2 (BH 4 )] ( I ) for the formation of II is proposed.
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