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Spectra and structure of gallium compounds: 8 —Vibrational studies of trimethylgallane‐dimethylether and trimethylgallane‐dimethylether‐ d 6
Author(s) -
Odom J. D.,
Wasacz F. M.,
Sullivan J. F.,
Durig J. R.
Publication year - 1981
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.1250110609
Subject(s) - raman spectroscopy , chemistry , adduct , spectral line , valence (chemistry) , gallium , moiety , computational chemistry , crystallography , molecular physics , stereochemistry , physics , organic chemistry , astronomy , optics
The infrared (4000–80 cm −1 ) and Raman (3500–10 cm −1 ) spectra of (CH 3 ) 3 GaO(CH 3 ) 2 and (CH 3 ) 3 GaO(CD 3 ) 2 have been recorded for the solid state at 77 K. The Raman spectra of the liquids have also been recorded and depolarization values measured. The spectra have been interpreted in detail on the basis of C s molecular symmetry. The valence force field model has been utilized in calculating the frequencies and potential energy distribution for the heavy atom skeleton. Considerable coupling has been observed among the OC 2 bending motions and the GaC 3 bending modes. The GaO stretch could not be assigned to a particular low frequency band, but this motion contributed significantly to four different bands ranging in frequency from 279 to 148 cm −1 . The calculated force constants for the adducts are compared to those previously reported for the Lewis base moiety and the differences are shown to be consistent with structural changes expected upon adduct formation.