Issue 12, 2004
From the journal:

New Journal of Chemistry

Copper coordination compounds of chelating imidazole-azo-aryl ligand. The molecular structures of bis[1-ethyl-2-(p-tolylazo)imidazole]-bis-(azido)copper(ii) and bis[1-methyl-2-(phenylazo)imidazole]-bis(thiocyanato)copper(ii)†

Umasankar Ray,a   Debasis Banerjee,a   Golam Mostafa,b   Tian-Huey Luc  and  Chittaranjan Sinha‡*a  

* Corresponding authors

a Department of Chemistry, The University of Burdwan, Burdwan, India
E-mail: c_r_sinha@yahoo.com

b Department of Physics, Jadavpur University, Kolkata, India

c Department of Physics, National Tsing Hua University, Hsinchu, ROC

Abstract

Reaction of Cu(ClO4)2 6H2O with 1-alkyl-2-(arylazo)imidazole [RaaiR′ where R = H (a), Me (b); R′ = Me (1), Et (2)] and NaN3/NH4SCN (1 ∶ 2 ∶ 2 mole ratio) form mononuclear complexes [Cu(RaaiR′)2(N3)2] (3,4) and [Cu(RaaiR′)2(SCN)2]. DMF (5,6). The complexes are characterized by elemental, spectral, electrochemical and other physicochemical results. The structures of both the complexes are confirmed by the single crystal X-ray diffraction studies of [Cu(MeaaiEt)2(N3)2] (4b) and [Cu(HaaiMe)2(SCN)2]. DMF (5a). The complexes are reduced to [Cu(RaaiR′)2]+ by ascorbic acid. However, air oxidation of [Cu(MeaaiEt)2](ClO4) in presence of N3−/SCN− produces [Cu(MeaaiEt)2(N3/NCS)2].

Graphical abstract: Copper coordination compounds of chelating imidazole-azo-aryl ligand. The molecular structures of bis[1-ethyl-2-(p-tolylazo)imidazole]-bis-(azido)copper(ii) and bis[1-methyl-2-(phenylazo)imidazole]-bis(thiocyanato)copper(ii)

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Article information

DOI
https://doi.org/10.1039/B406445C
Article type
Paper
Submitted
28 Apr 2004
Accepted
13 Aug 2004
First published
19 Oct 2004

New J. Chem., 2004,28, 1437-1442

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Copper coordination compounds of chelating imidazole-azo-aryl ligand. The molecular structures of bis[1-ethyl-2-(p-tolylazo)imidazole]-bis-(azido)copper(II) and bis[1-methyl-2-(phenylazo)imidazole]-bis(thiocyanato)copper(II)

U. Ray, D. Banerjee, G. Mostafa, T. Lu and C. Sinha, New J. Chem., 2004, 28, 1437 DOI: 10.1039/B406445C

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