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Spectra and structure of phosphorus‐boron compounds. XV: vibrational studies of substituted P ‐ Hexamethylcyclotriborophosphanes
Author(s) -
Durig J. R.,
Sens M. A.,
Kalasinsky V. F.,
Odom J. D.
Publication year - 1976
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250050408
Subject(s) - raman spectroscopy , chemistry , boron , molecule , hexa , infrared spectroscopy , intermolecular force , crystallography , spectral line , molecular symmetry , infrared , organic chemistry , physics , astronomy , optics
The infrared spectra (3500−30 cm −1 ) of solid hexa‐substituted P‐hexamethylcyclotriborophosphanes [(CH 3 ) 2 PBX 2 ] 3 where X = F, Cl, Br, I and CH 3 and some corresponding B‐monosubstituted and disubstituted species have been recorded. The Raman spectra (3500−10 cm −1 ) of the corresponding solids have also been investigated. The vibrational spectra of the hexa‐substituted compounds could best be interpreted on the basis of C 3ν molecular symmetry. The observed intermolecular vibrations for these solids indicate little factor group effects. The vibrational spectra of the corresponding B‐monosubstituted compounds were very similar to those for the parent molecules with the addition of three ‘new’ B‐X motions. The molecular symmetries are discussed in relation to a recent nuclear magnetic resonance study.