名称:
An antiferromagnetically coupled trinuclear Cu(II) complex containing μ(O,O′), μ(O) carboxylates and μ(O) phenoxide bridges
摘要:
The trinuclear complex [L2Cu3(CF3CO2)(4)] (1) has been synthesized and its crystal structure determined. It consists of a linear arrangement of Cu(II) centers. The central copper atom is bonded to six oxygen atoms and has a tetragonally distorted octahedral geometry, while the terminal copper atoms are bonded to three oxygen and two nitrogen atoms and show a distorted square pyramidal geometry. The complex shows di-mu(O,O') syn-syn carboxylate bridging as well as monoatomic (mu-O) bridging, along with phenolate (mu-O) oxygen bridging. Cryomagnetic investigations in the range 2-300 K revealed an antiferromagnetic spin exchange interaction with J = -95.7 cm(-1), based on the isotropic exchange model H-ex = -2J[S-1 center dot S-2 + S-2 center dot S-3]. (C) 2006 Elsevier B.V. All rights reserved.