期刊
POLYHEDRON
卷 30, 期 4, 页码 676-681出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2010.12.006
关键词
Copper(II); Di-Schiff base ligand; Heterometallic complexes; Crystal structure; Electrochemical behavior
资金
- CSIR, India [09/028 (0732)/2008-EMR-I]
- DST-FIST, India
A tetra-nuclear, heterometallic copper(II)-cadmium(II) complex, [{CuL(H2O)}(2)(CuL)Cd](ClO4)(2)center dot H2O (1) has been synthesized by reacting the ligand complex [CuL] with Cd(ClO4)(2) where H2L is the tetradentate di-Schiff base derived from 1,3-propanediamine and 2-hydroxyacetophenone. Complex 1 transforms into a trinuclear species, [(CuL)(2)Cd(NCS)(2)] (2) on treatment with an ammonium thiocyanate solution. Both complexes have been characterized by X-ray single crystal structure analyses. In both structures, the central Cd(II) ion has a six-coordinate distorted octahedral environment being bonded to six oxygen atoms from three Cu(II) units in 1 and to four oxygen atoms from two [CuL] units along with a couple of thiocyanate nitrogen atoms in complex 2. Complex (1) exhibits reversible reductive (Cu(II)/Cu(I); Epc, -1.03 V) and oxidative (Cu(II)/Cu(III); Epa, + 1.04 V. respectively) responses in cyclic voltammetry. The generated Cu(I) species for both the complexes are unstable and undergo disproportionation. (C) 2010 Elsevier Ltd. All rights reserved.
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