15min:

THOMAS A. BLAKE, ROBERT L. SAMS AND STEVEN W. SHARPE, Pacific Northwest National Laboratory, P. O. Box 999, Mail Stop K8-88, 3020 Q Avenue, Richland, WA 99352.

We have recorded the ₄ band (Herzberg numbering) of benzene 1,3,5 -d3 using high resolution (0.0015 cm^-1) Fourier transform infrared spectroscopy. The spectrum was taken with the benzene sample in a temperature stabilized cell (4 ^\circC), 20 cm in length. The interferometer used a mylar beamsplitter and the spectrum was recorded with a liquid helium-cooled silicon bolometer. For the band we have fit the following preliminary spectroscopic constants: ₀ = 531.06401(1) cm^-1, B' = 0.171542(2) cm^-1, (C' - B') - (C'' - B'') = 3.48(2)× 10^-4 cm^-1, B'' = 0.171842(3) cm^-1. Band centers of the observed sequences of hot bands will be reported.