Pentacoordinate Silyl Cations Stabilized by Coordination with Oxygen Donors: Crystal Structure, Charge Distribution, and Stereodynamics
Organometallics2001Vol. 20(6), pp. 1053–1055
Citations Over TimeTop 10% of 2001 papers
Abstract
Attempted preparation of neutral hexacoordinate silicon chelates with two O→Si dative bonds (4), in analogy to previously reported bis-N→Si isomers (2), resulted in unexpected formation of pentacoordinate siliconium complexes (5 and 6), characterized by a crystal structure. The barrier for inversion of configuration at silicon was determined by selective inversion recovery NMR measurements: ΔG* = 20.5 ± 0.2 kcal mol-1.
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