HIGH RESOLUTION RAMAN SPECTROSCOPY OF GASES: VII. ROTATIONAL SPECTRA OF <i>s</i>-TRIAZINE AND <i>s</i>-TRIAZINE-<i>d</i>₃

Abstract

The pure rotational Raman spectra of s-triazine (C 3 H 3 N 3 ) and s-triazine-d 3 (C 3 D 3 N 3 ) vapor were photographed in the second order of a 21-ft. grating spectrograph. The rotational constants were found to be B 0 (C 3 D 3 N 3 ) = 0.2146 0 ± 0.00008 cm −1 and B 0 (C 3 D 3 N 3 ) = 0.1935 8 ± 0.0001 5 cm −1 . These values, together with the assumption that the molecule is planar and has a CH bond length of 1.084 Å, give the following values for the structural parameters: r 0 (CN) = 1.338 ± 0.001 Å, [Formula: see text]NCN = 127°, and [Formula: see text]CNC = 113°.