Table of Contents
SRX Chemistry
Volume 2010, Article ID 424392, 6 pages
http://dx.doi.org/10.3814/2010/424392
Research Article

Gold-dppm-Arylazoimidazole Complexes: Synthesis, Spectra, and Redox Study

1Departmento de Quimica Inorganica, Instituto de Ciencia de Materiales de Aragon, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
2Haldia Institute of Technology, Hatiberia, Haldia, Midnapur 721657, India

Received 31 July 2009; Accepted 23 September 2009

Copyright © 2010 Prithwiraj Byabartta. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

[Ag(tht)(OTf)]-assisted reaction produces [AuIII(dppm)(tht)2](OSO2CF3)2, reacts with RaaiR in dichloromethane medium followed by ligand addition, and leads to [AuIII(dppm)(RaaiR)](OTf)2(RaaiR=p–R–C6H4–N=N–C3H2–NN–1–R, (1–3), abbreviated as N,N-chelator, where N(imidazole) and N(azo) represent N and N, resp.; R = H (a), Me (b), Cl (c) and R= Me (1), CH2CH3(2), CH2Ph (3), dppm is diphenylphosphinomethane, OSO2CF3 is the triflate anion, and tht is tetrahydrothiophen). Ir spectra of the complexes show –C=N– and –N=N– stretching near at 1590 and 1370 cm1 and near at 1100, 755, 695, 545, and 505 cm1 due to the presence of dppm. The H1 NMR spectral measurements suggest that methylene, –CH2–, in RaaiEt gives a complex AB type multiplet while in RaaiCH2Ph it shows AB type quartets. Electrochemistry assigns ligand reduction.