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A Valence Bond Description of Dizwitterionic Dithiolene Character in an Oxomolybdenum-bis(dithione).


ABSTRACT: Metallo-dithiolene non-innocence is explored in an oxomolybdenum-bis(dithione) complex, [Mo4+O(i-Pr2Pipdt)2Cl][PF6] (where i-Pr2Pipdt is N,N'-piperazine-2,3-dithione), that possesses a piperazine ring as an integral part of the dithiolene ligand. The title complex displays unusual spectroscopic features for a formally reduced Mo(IV) dithiolene complex, namely a low energy metal-to-ligand charge transfer band with appreciable intensity and C-C and C-S stretching frequencies that are markedly different from those of oxomolydenum complexes coordinated to dianionic dithiolene ligands. The electronic structure of the ligand has been described in valence bond terms as a resonance hybrid of dithione and dizwitterionic dithiolene contributing structures.

SUBMITTER: Mtei RP 

PROVIDER: S-EPMC3742805 | biostudies-literature | 2011 Dec

REPOSITORIES: biostudies-literature

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A Valence Bond Description of Dizwitterionic Dithiolene Character in an Oxomolybdenum-bis(dithione).

Mtei Regina P RP   Perera Eranda E   Mogesa Benjamin B   Stein Benjamin B   Basu Partha P   Kirk Martin L ML  

European journal of inorganic chemistry 20111201 36


Metallo-dithiolene non-innocence is explored in an oxomolybdenum-bis(dithione) complex, [Mo<sup>4+</sup>O(<i>i</i>-Pr<sub>2</sub>Pipdt)<sub>2</sub>Cl][PF<sub>6</sub>] (where <i>i</i>-Pr<sub>2</sub>Pipdt is N,N'-piperazine-2,3-dithione), that possesses a piperazine ring as an integral part of the dithiolene ligand. The title complex displays unusual spectroscopic features for a formally reduced Mo(IV) dithiolene complex, namely a low energy metal-to-ligand charge transfer band with appreciable in  ...[more]

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