Four independent structures of a pentacoordinate silicon species at different points on the Berry pseudorotation pathway
作者:Alan R. Bassindale、M. Sohail、Peter G. Taylor、Alexander A. Korlyukov、Dmitry E. Arkhipov
DOI:10.1039/c000803f
日期:——
A new pentacoordinate silicon species containing two chelating ligands has been synthesized. The structures of four independent cations of the same compound correspond to different points on the Berry pseudorotation pathway. The percentage of square planar character varies between 19% and 40%.
Synthesis and Hydrolysis–Condensation Study of Water-Soluble Self-Assembled Pentacoordinate Polysilylamides
作者:Muhammad Sohail、Alan R. Bassindale、Peter G. Taylor、Alexander A. Korlyukov、Dmitry E. Arkhipov、Louise Male、Simon J. Coles、Michael B. Hursthouse
DOI:10.1021/om301137b
日期:2013.3.25
each repeat unit and the mode of packing within the polymers that contain these monomer units. It is found that the partialhydrolysis of the model pentacoordinate chlorosilanes gives water-coordinated pentacoordinate silicon species that resemble an intermediate in the aqueous hydrolysis of pentacoordinate polysilylamides.
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.
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.