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Issue 8, 2009
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Stabilisation of an inorganic digallane by the phosphinobisthiolato P,S,S pincer ligand PPh(2-SC6H4)2

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Abstract

The pincer ligand PPh(2-HSC6H4)2 reacts with GaCl3 in the presence of triethylamine to yield the anionic gallium complex [NEt3H][Ga{PPh(2-SC6H4)23S,S′,P}{PPh(2-SC6H4)22S,S′}] (1), which undergoes cation exchange with PPh4Cl to give [PPh4][Ga{PPh(2-SC6H4)23S,S′,P}{PPh(2-SC6H4)22S,S′}] (2). Neutral complexes GaR{PPh(2-SC6H4)23S,S′,P} [R = Me (3), tBu (4)] were obtained by reaction of PPh(2-HSC6H4)2 with trialkyl gallium compounds (GaMe3, GatBu3). Compound 4 is light-sensitive and decomposes in daylight or under UV irradiation. Three decomposition products could be isolated: tetranuclear hydrido-bridged mixed-valent gallium(II)–gallium(III) complex [GaIII{PPh(2-SC6H4)-κ2S,P-μ-(2-SC6H4)-κS′}2]23-H)2GaII2 (Ga–Ga) (5), gallium(II) complex [Ga{PPh(2-SC6H4)23S,S′,P}]2 (Ga–Ga) (6), and sulfido-bridged dinuclear complex [Ga{PPh(2-SC6H4)23S,S′,P}]2(μ-S) (7). The molecular structures of 2–7 are described.

Graphical abstract: Stabilisation of an inorganic digallane by the phosphinobisthiolato P,S,S pincer ligand PPh(2-SC6H4)2

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Supplementary files

Article information


Submitted
16 Apr 2009
Accepted
02 Jun 2009
First published
08 Jul 2009

New J. Chem., 2009,33, 1771-1779
Article type
Paper

Stabilisation of an inorganic digallane by the phosphinobisthiolato P,S,S pincer ligand PPh(2-SC6H4)2

A. Vălean, S. Gómez-Ruiz, P. Lönnecke, I. Silaghi-Dumitrescu, L. Silaghi-Dumitrescu and E. Hey-Hawkins, New J. Chem., 2009, 33, 1771
DOI: 10.1039/B907668A

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