Characteristic Frequencies of Trimethylborane

Abstract

Contrary to previously published values, the characteristic B–C asymmetric stretching mode in trialkylboranes is assigned to the 1116 to 1150 cm—1 range. The basis for the assignment of the various characteristic bond vibrations is the comparison of the infrared spectrum of trimethylborane-b10 with the infrared and Raman spectra of isotopically normal trimethylborane. The new values lead to better consistency with spectra of other trialkylboranes and alkyldiboranes.