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Comprehensive Insight into the Hydrogen Bonding of Silanes
Author(s) -
Voronova Evgenia D.,
Golub Igor E.,
Pavlov Alexander A.,
Belkova Natalia V.,
Filippov Oleg A.,
Epstein Lina M.,
Shubina Elena S.
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801156
Subject(s) - silanes , hydrogen bond , intermolecular force , chemistry , proton , non covalent interactions , hydrogen , fourier transform infrared spectroscopy , proton nmr , crystallography , computational chemistry , molecule , stereochemistry , silane , organic chemistry , chemical engineering , physics , quantum mechanics , engineering
The interaction of a set of mono‐, di‐ and trisubstituted silanes with OH proton donors of different strength was studied by variable temperature (VT) FTIR and NMR spectroscopies at 190–298 K. Two competing sites of proton donors coordination: SiH and π‐density of phenyl rings—are revealed for phenyl‐containing silanes. The hydrogen bonds SiH⋅⋅⋅HO and OH⋅⋅⋅π(Ph) are of similar strength, but can be distinguished in the ν SiH range: the ν SiH⋅⋅⋅HO vibrations appear at lower frequencies while OH⋅⋅⋅π(Ph) complexes give Si–H vibrations shifted to higher frequency. The calculations showed the manifold picture of the noncovalent interactions in hydrogen‐bonded complexes of phenylsilanes. As OH⋅⋅⋅HSi bonds are weak, the other noncovalent interactions compete in the stabilization of the intermolecular complexes. Still, the structural and electronic parameters of “pure” DHB complexes of phenylsilanes are similar to those of Et 3 SiH.