Reactions of cyclopalladated azobenzenes with xanthates and dithiocarbamates. Spectral characterisation and electrochemical studies of the products |
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Authors: | Roy Ramkrishna Bag Kanchan Santra Prasanta Kumar Sinha Chittaranjan |
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Institution: | (1) Department of Chemistry, The University of Burdwan, Burdwan, 713104, India |
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Abstract: | Binuclear chloro-bridged cyclopalladated azobenzenes Pd(A)Cl]2 (A = ortho-metallated azobenzene or its derivatives) have been reacted with aqueous AgNO3 to yield aquo-derivatives followed by the addition of xanthates, or dithiocarbamates (RCS2
–) to synthesise ternary complexes, Pd(A)(RCS2)]. These complexes occur as configurational isomers and their compositions have been established by 1H-n.m.r. spectroscopy. Cyclic voltammetric studies show azo reduction at negative and thiol oxidation at positive potentials relative to s.c.e., respectively. Dissociation of RCS2
– under the electrode field is chemically supported by using a sulfide extractor, HgCl2, Hg(OAc)2, or AgOAc, to precipitate out the binuclear Pd(A)Cl]2/Pd(A)(OAc)]2 complexes. |
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