Abstract
This work reports the synthesis, characterization and electrochemical studies of several [Mo VI OS] 2+ complexes of some tridentate ONS donor ligands obtained by the condensation of salicylaidehyde/2-hydroxyacetophenone with S-benzyl and S-methyl dithiocarbazates. In this work PPh 3 and PPh 3 S mixture is used as the synthetic reagent. The general strategy of synthesizing the complexes of the [MoOSL] type with the [MoOS] 2+ core from corresponding complexes with the [MoO 2 ] 2+ core by in situ oxoremoval-sulphide addition process. Presence of the oxothio core in all the [MoOSL] complexes is established by their reaction with KCN resulting in the formation of the CNS - species. All the complexes are characterized by various spectroscopic (NMR, IR, UV-Vis) techniques and also by cyclic voltammetry. All the complexes exhibit an irreversible overall 2 electron reductive response probably by proton assisted loss of the sulphido group leading to the formation of the corresponding [MoOL] complex.
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