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- W2218591229 abstract "The donor-acceptor interaction of SnX/sub 4/ (X = Cl, Br) with tertiary phosphines (nBu/sub 3/P, Me/sub 2/PhP, Ph/sub 3/P) has been studied by /sup 31/P and /sup 119/Sn spectroscopy over a broad range of temperatures and with varous donor-acceptor ratios (D/A) in solutions in methylene chloride. An analysis of the direct spin-spin coupling constants /sup 1/J(/sup 119/Sn-/sup 31/P) and the multiplicity in the /sup 119/Sn NMR spectra made it possible to propose a complexation mechanism, which includes the formation of intermediate ionic structures along with the molecular complexes AD and AD/sub 2/. It has been shown that an excess of the acceptor is not a sufficient condition for the formation of the complex AD. The coexistence of cis and trans isomers of the AD/sub 2/ complexes in solution has been established, and the dependence of /sup 1/J(/sup 119/Sn-/sup 31/P) on the geometry of the P-Sn-P fragment in the octahedral complexes has been demonstrated. The use of low-temperature NMR made it possible, in most cases, to suppress the occurrence of the redox reaction between the compounds of Sn(IV) and the tertiary phosphines." @default.
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- W2218591229 date "1986-10-01" @default.
- W2218591229 modified "2023-09-24" @default.
- W2218591229 title "/sup 31/P and /sup 119/Sn NMR of adducts of tin tetrahalides with tertiary phosphines" @default.
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