Synthesis and Reactivity of a Bio-inspired Dithiolene Ligand and its Mo Oxo Complex

Chemistry : a European Journal
Jean-Philippe PorcherMarc Fontecave

Abstract

An original synthesis of the fused pyranoquinoxaline dithiolene ligand qpdt(2-) is discussed in detail. The most intriguing step is the introduction of the dithiolene moiety by Pd-catalyzed carbon-sulfur coupling. The corresponding Mo(IV) O complex (Bu4 N)2 [MoO(qpdt)2 ] (2) underwent reversible protonation in a strongly acidic medium and remained stable under anaerobic conditions. Besides, 2 was found to be very sensitive towards oxygen, as upon oxidation it formed a planar dithiin derivative. Moreover, the qpdt(2-) ligand in the presence of [MoCl4 (tBuNC)2 ] formed a tetracyclic structure. The products resulting from the unique reactivity of qpdt(2-) were characterized by X-ray diffraction, mass spectrometry, NMR spectroscopy, UV/Vis spectroscopy, and electrochemistry. Plausible mechanisms for the formation of these products are also proposed.

References

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Sep 26, 2015·Angewandte Chemie·Jean-Philippe PorcherMarc Fontecave
Nov 7, 2015·Chemistry : a European Journal·Igor V PimkovPartha Basu

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Citations

Mar 10, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Thibault FogeronYun Li
Jul 19, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Thibault FogeronMarc Fontecave
Sep 3, 2020·Chemical Science·Ahmed MouchfiqVictor Mougel
Nov 12, 2021·Accounts of Chemical Research·Yun LiMarc Fontecave

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