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.