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A New Class of Eight-Membered Sn2P2O4 Heterocycles. Crystal Structure and Electrolytic Dissociation in Solution of cyclo-[R2Sn(OPPh2O)2SnR2](O3SCF3)2 (R = Me, t-Bu)
journal contribution
posted on 2003-04-17, 00:00 authored by Jens Beckmann, Dainis Dakternieks, Andrew Duthie, Cassandra MitchellThe syntheses of cyclo-[R2Sn(OPPh2O)2SnR2](O3SCF3)2 (R = Me (1), t-Bu (2)) by the consecutive
reaction of R2SnO (R = Me, t-Bu) with triflic acid and
diphenylphosphinic acid are presented. In the solid state,
1 and 2 were investigated by 119Sn MAS and 31P MAS
NMR spectroscopy as well as X-ray crystallography and
appear to exist as ion pairs of cyclo-[R2Sn(OPPh2O)2SnR2]2+ dications and triflate anions. In solution, 1 and
2 are involved in extensive equilibria processes featuring
cationic diorganotin(IV) species with Sn−O−P linkages,
as evidenced by 119Sn and 31P NMR spectroscopy,
electrospray mass spectrometry, and conductivity measurements.