ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The preparation of 1 : 1 molecular adducts H3NGaX3 and H3PGaX3 (X = Cl or Br) is described. The IR (40-4000 cm-1) and Raman (50-3500 cm-1) spectra of these compounds have been recorded and 11 of the 12 fundamental vibrations are assigned on the basis of C3ν molecular symmetry. A force field of seven valence force constants and three or four interaction constants is utilized in calculating the frequencies and potential energy distributions. Changes in NH3 and PH3 frequencies and force constants are consistent with structural changes upon coordination. Modes of Ga—N stretching, 480-500 cm-1, and Ga—P stretching, 280-305 cm-1, are assigned and force constants k(Ga—N) = 1.85-2.0 mdyn Å-1 and k(Ga—P) = 1.0-1.2 mdyn Å-1 are obtained. Normal modes of vibration of the ammonia adducts are nearly pure but some coupling is found between gallium-phosphorus and gallium-halogen stretches in the case of the phosphine adducts.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250150603
