Synthesis and crystal structure of a heterometallic tetra-nuclear copper (II)–cadmium (II) complex and its anion modulated conversion into a trinuclear species

Biswas, Saptarshi ; Ghosh, Ashutosh (2011) Synthesis and crystal structure of a heterometallic tetra-nuclear copper (II)–cadmium (II) complex and its anion modulated conversion into a trinuclear species Polyhedron, 30 (4). pp. 676-681. ISSN 0277-5387

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.poly.2010.12.006

Abstract

A tetra-nuclear, heterometallic copper (II)–cadmium (II) complex, [{CuL(H2O)} 2(CuL)Cd](ClO4)2•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) 2Cd(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.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Copper (II); Di-Schiff Base Ligand; Heterometallic Complexes; Crystal Structure; Electrochemical Behavior
ID Code:108324
Deposited On:13 Oct 2017 13:09
Last Modified:13 Oct 2017 13:09

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