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- W2009146544 abstract "Dichlorodibutylstannane, dichlorodioctylstannane and dichlorodiphenylstannane were reacted with different amounts of sodium in liquid ammonia. At a molar ratio of R2SnCl2/Na of 1:2, polystannanes precipitated, in some cases accompanied by cyclic oligostannanes. The products resulting from mixtures with R2SnCl2/Na ratios of 1:3 to 1:10 were soluble and, hence, could be studied in-situ in liquid ammonia with 119Sn NMR spectroscopy. The compounds obtained, tin hydrides of the type R2SnH− and in certain cases distannides of the composition R4Sn22−, formed essentially independent of the R2SnCl2/Na ratio; this, in contrast to views expressed in the literature. Our experiments showed that the chemical structure of the in-situ generated species did not permit to draw conclusions about the composition of the reaction products with bromoethane and vice versa – a practice commonly described. Furthermore, we observed migration of the butyl groups both in-situ during the reaction of dichlorodibutylstannane with sodium in liquid ammonia, as well as in the final reaction product. By contrast in the case of the phenyl substituent, migration was detected not during the chemical event in liquid ammonia, but only in the compounds formed. These observations imply a different mechanism for butyl and phenyl group migration." @default.
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- W2009146544 date "1964-06-01" @default.
- W2009146544 modified "2023-10-16" @default.
- W2009146544 title "Zur Existenz von (C6H5)2SnLi2 und (C6H5)2Sn(SLi)2" @default.
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- W2009146544 doi "https://doi.org/10.1016/s0022-328x(00)87605-6" @default.
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