A LINEAR, MONOMERIC COPPER(I) ACETATE DERIVATIVE, [CU(PHEN)2]2[CU(O2CCH3)2].(O2CCH3)2H - AN EFFECTIVE CATALYST FOR THE DECARBOXYLATION OF CARBOXYLIC-ACIDS
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The complex [Cu(phen)2]2[Cu(O2CCH3)2].(O2CCH3)2H, derived from the reaction of CuO2CCH3 with 1, 10-phenanthroline in dichloromethane, has been characterized by X-ray crystallography at 80 C. The crystals are monoclinic, space group C2/c with unit cell dimensions a = 22.503 (11) , b = 14.066 (6) , c = 16.829 (11) , = 112.44 (4), V = 4923 (5) 3, Z = 4, and RF-6.52%. The compound is shown to have the above stoichiometry, containing a unique, linear, mononuclear copper(I) acetate anion. The monodentate coordination of the acetates results in Cu2-O1 and Cu2-O1a distances (2.808 ) which are significantly greater than those observed for the corresponding bonding interactions between Cu2-O2 and Cu2-O2a (1.821 (8) ). The title complex was observed to be an extremely effective catalyst or catalyst precursor for the homogeneous decarboxylation of the carboxylic acids cyanoacetic and 9-fluorenecarboxylic acids. 1992, American Chemical Society. All rights reserved.