On the mechanism derived from kinetic solvent effects of Grignard reactions with silanes
β Scribed by Ants Tuulmets; Dmitri Panov; Meeri Sassian
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- French
- Weight
- 63 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
In this communication we present the results of initial kinetic studies in which we have established that alkoxysilanes and chlorosilanes react with Grignard reagents in entirely different ways. The Grignard reaction with alkoxysilanes consists of replacement of a donor molecule at the magnesium centre by silane, followed by a subsequent rearrangement of the complex to the products. Chlorosilanes react without solvent molecule replacement.
π SIMILAR VOLUMES
The result of the substitution of trityl chlorides with Grignard reagents was found to be highly dependent on the solvent and the nature of the substituents on the trityl group. In THF, electron donating substituents were found to give high yields of Grignard addition while electron withdrawing subs