Comprehensive Insight into the Hydrogen Bonding of Silanes
作者： Evgenia D. Voronova , Igor E. Golub , Alexander A. Pavlov , Natalia V. Belkova , Oleg A. Filippov
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摘要: The interaction of a set mono-, di- and trisubstituted silanes with OH proton donors different strength was studied by variable temperature (VT) FTIR NMR spectroscopies at 190-298 K. Two competing sites coordination: SiH π-density phenyl rings-are revealed for phenyl-containing silanes. hydrogen bonds SiH⋅⋅⋅HO OH⋅⋅⋅π(Ph) are similar strength, but can be distinguished in the νSiH range: νSiH⋅⋅⋅HO vibrations appear lower frequencies while complexes give Si-H shifted to higher frequency. calculations showed manifold picture noncovalent interactions hydrogen-bonded phenylsilanes. As OH⋅⋅⋅HSi weak, other compete stabilization intermolecular complexes. Still, structural electronic parameters "pure" DHB phenylsilanes those Et3 SiH.
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