Polysilanes fonctionnels, 4. Duplication réductrice de chlorosilanes par le lithium pour la synthèse d'α,ω‐bis(triméthylsilyl) oligo(méthylphénylsilane)s. Réactions parasites de silylation des noyaux phényle

doi:10.1002/MACP.1995.021960109

Paper

Polysilanes fonctionnels, 4. Duplication réductrice de chlorosilanes par le lithium pour la synthèse d'α,ω‐bis(triméthylsilyl) oligo(méthylphénylsilane)s. Réactions parasites de silylation des noyaux phényle

Published 1995 · D. Reyx, José Manuel Natário Martins, Irène Campistron

Macromolecular Chemistry and Physics

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Abstract

The coupling of dichloromethylphenylsilane (1) with chlorotrimethylsilane (2) by lithium is considered for the synthesis of low-molecular-weight organosilane polymers 3 and for the preparation of heptamethylphenyl-2-trisilane (3a) and octamethyldiphenyl-2,3-tetrasilane (3b). Size-exclusion chromatography, ultraviolet and infrared spectroscopies and nuclear magnetic resonance (1H, 13C and 29Si NMR) analyses of the crude product 3 were performed and compared with those of 3a and 3b. According to the spectroscopic characteristics of heptamethyltetrakis(trimethylsilyl)-3,4,5,6-cyclohex-1-enyl-2-trisilane (4), and the observed silylation of the trisilane 3a when it is submitted to the action of a (CH3)3SiCl/Li/tetrahydrofuran system, the silylation of the phenyl ring during the reductive condensation of the chlorosilanes is supported by NMR identification of 4-like structures.

Study Snapshot

Lithium-catalyzed coupling of dichloromethylphenylsilane and chlorotrimethylsilane leads to the synthesis of low-molecular-weight organosilane polymers and the preparation of heptamethylphenyl-2-trisilane and

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Polysilanes fonctionnels, 4. Duplication réductrice de chlorosilanes par le lithium pour la synthèse d'α,ω‐bis(triméthylsilyl) oligo(méthylphénylsilane)s. Réactions parasites de silylation des noyaux phényle

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References

Citations

Synthesis and Structural Characterization of Isomeric Bis[3,4,5,6-tetrakis(trimethylsilyl)cyclohexen-1-yl]dimethoxysilanes

Isomeric bis[3,4,5,6-tetrakis(trimethylsilyl)cyclohexen-1-yl]dimethoxysilanes were successfully synthesized and characterized.