Selenium silicon halides

In spite of the hazardous nature of Sc4N4, this binary selenium nitride has been used for the synthesis of other Se-N compounds, all of which have sulfur analogues (Scheme 5.2). " However, safer alternatives to the use of Sc4N4, e.g., selenium-nitrogen halides and silicon-nitrogen-selenium reagents, are available for the development of Se-N chemistry. ... 

Silastannathianes containing the unit SiSSn can be prepared from the reaction of a mixture of tin halide and silicon halide with hydrogen sulfide in the presence of an amine, and the corresponding selenium and tellurium compounds from a similar reaction using lithium selenide or lithium telluride.14... 

The other halides of boron and silicon, and also of, phosphorus, sulphur, selenium, tellurium, and iodine, react at once with water, forming hydrogen halide and an acid. The equations are as follows —... 

The difluorovinyllithium 566 was initially prepared by in situ dehydrofluorina-tion-deprotonation of the TV.TV-diethyl carbamate derivative 568 with two equiv of LiTMP845 or LDA844,845 (Scheme 154). This intermediate 566 showed lower reactivity than the corresponding defluorinated system 561. Moderate to good yields were obtained with silicon, selenium and tin halides (38-80%)844,845,847 and alkyl triflates (71-91%)845, moderate reactivity being showed toward carbon dioxide and carbonyl compounds844,845,847. The reaction of intermediate 566 with aldehydes gave compound... 

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