摘要:
The synthesis and crystal structures of two new copper complexes with chelating dicarboxylic acids are described. Reaction of copper(II) acetate with diacid H2L2 (HO2CC(Me)(2)OArOC(Me)(2)CO2H, Ar = 1,3-substituted phenyl) gave a bischelate complex (L-2)(2)Cu-2 (.) 2MeOH with the normal paddlewheel structure and tilted, trans-oriented chelate rings with skewed conformations. The overall structure was reasonably well reproduced by density functional calculations on (L2)(2)Cu-2. Treatment of the product from reaction of Cu-2(OAc)(4) and diacid H2L3 (Ar = 1,3-substituted 2,4-dibromophenyl) with pyridine gave a six-coordinate mononuclear chelate (L3)Py2Cu (.) H2O in which one chelate carboxylate is monodentate, the other is unsymmetrically bidentate, and the pyridines are cis-coordinated. (C) 2003 Elsevier B.V. All rights reserved.