Tin-119 and carbon-13 NMR studies on tin(IV) xanthates

doi:10.1016/S0020-1693(00)91210-6

Inorganica Chimica Acta

Volume 75, 1983, Pages 185-188

https://doi.org/10.1016/S0020-1693(00)91210-6 Get rights and content

Abstract

Tin-119 NMR spectroscopy of solutions containing Sn(exa)₄ and Sn(isopropxa)₄ establishes the existence of the mixed xanthates Sn(exa)_n(i-propxa)_4−n. Furthermore, evidence is obtained for the existence of mono-, di-, and trihaloxanthates in solutions of appropriate mixtures of the tetraxanthates, dihaloxanthates and tetrahalides. The xanthate ligands undergo temperature dependent monodentate-bidentate exchange about the tin atom which determines the nature of the complexes observed in the various mixtures.

References (5)

R. Colton et al.
Inorg. Chim. Acta
(1982)
R. Colton et al.
Inorg. Chim. Acta
(1983)

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Tin-119 and carbon-13 NMR studies on tin(IV) xanthates

Abstract

Inorg. Chim. Acta

Inorg. Chim. Acta