Reactions of strained organosilicon heterocycles with nonacarbonyldi-iron(0). Part I. Reactivity and mechanism
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 10,p. 910-914
- https://doi.org/10.1039/dt9760000910
Abstract
The formation of 2,2,2,2-tetracarbonyl-1-sila-2-ferracyclopentanes by the reaction of silacyclobutanes with nonacarbonyldi-iron is described, and the nature of the process discussed. Completely regioselective reactions are found with Me2[graphic omitted](Me)H[Si–CH2 and not Si–C(Me)H cleavage] and with two silabenzocyclobutenes R2[graphic omitted]H2(R = Me or Ph)[C(arly)–Si and not C(alkyl)–Si cleavage]. With mixtures of the two isomers of XMe[graphic omitted]H2(X = Bun, isomer ratio 4:1: X = MeO, isomer ratio 7:3) the reaction is stereospecific, there being no significant change in isomer ratio between the reactant and product. It is concluded that this facile [Fe(CO)4] insertion is probably an electrophilic C–Si cleavage reaction and that the process, using the term broadly, is concerted.Keywords
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