Abstract
The crystal structure of the silicon tetrafluoride molecular complex with 4-phenylpyridine SiF4 center dot 2ppy has been determined by X-ray diffraction analysis. Although 4-phenylpyridine has a higher proton affinity than pyridine, the Si-N bond length in crystalline SiF4 center dot 2Py is shorter by 0.03(2) angstrom than in SiF4 center dot 2ppy. The energies of donor-acceptor Si-N bonds in SiF4 ...
Abstract
The crystal structure of the silicon tetrafluoride molecular complex with 4-phenylpyridine SiF4 center dot 2ppy has been determined by X-ray diffraction analysis. Although 4-phenylpyridine has a higher proton affinity than pyridine, the Si-N bond length in crystalline SiF4 center dot 2Py is shorter by 0.03(2) angstrom than in SiF4 center dot 2ppy. The energies of donor-acceptor Si-N bonds in SiF4 center dot 2Py (220.6 kJ/mol) and SiF4 center dot 2ppy (225.0 kJ/mol) calculated by the M06-2X/def2-TZVP method agree with a slightly higher proton affinity of 4-phenylpyridine.
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