Modelling nucleophilic substitution at silicon using hypervalent silicon compounds based on di and tri halosilanes
作者:Alan R. Bassindale、Moheswar Borbaruah、Simon J. Glynn、David J. Parker、Peter G. Taylor
DOI:10.1016/s0022-328x(00)00263-1
日期:2000.7
range of N-(amidomethyl)-polyhalosilanes have been measured in solution and the extent of SiO bond formation and pentacoordination determined. The larger the number of electronegative groups attached to the silicon the greater the extent of pentacoordination achievable by the silicon. Thus with trichlorosilanes a ‘tight’ pentacoordinate silicon is observed where the SiO bond is almost fully formed.
Modelling nucleophilic substitution at silicon in solution, using hypervalent silicon compounds based on 2-pyridones
作者:Alan R. Bassindale、Moheswar Borbaruah、Simon J. Glynn、David J. Parker、Peter G. Taylor
DOI:10.1039/a904402g
日期:——
complexes has been determined from the 29Si chemical shift usingmodelcompounds for the tetracoordinate and pentacoordinate limiting cases. Correlation of the % Si–O bond formation with % pentacoordination enables the pathway for substitution at silicon to be mapped in solution. The generality of these techniques is examined using a series of related aromatic ligands.