Journal of Molecular Spectroscopy  Vol. 212, No. 1, March 1, 2002
 ISSN: 0022-2852
 EISSN: 1096-083X
 
 pp. 22-31 (doi:10.1006/jmsp.2001.8519) 

 High-Temperature Infrared Emission Spectra of D12C14N and D13C14N 

 E. Möllmann,   A. G. Maki,  M. Winnewisser,   B. P. Winnewisser,
 W. Quapp    

 Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen,
 Heinrich-Buff-Ring 58, Gießen, D-35392, Germany 
 15012 24 Avenue S.E., Mill Creek, Washington, 98012-5718 
 Mathematisches Institut, Universität Leipzig, Augustus-Platz 10-11, Leipzig,
 D-04109, Germany  


The infrared spectra of two isotopomers of deuterium cyanide, D12C14N and
D13C14N, were measured in emission at temperatures of 1370 K and 1520 K,
respectively, in the range from 450 to 850 cm-1 and, for D12C14N, also from
1800 to 2800 cm-1. Assignments were made for rovibrational transitions to
high bending states, v2=9 for D13C14N and v2=11 for D12C14N. To aid and
verify the assignments, bands of the lower bending states, up to v2=3, were
also measured in absorption at room temperature. A global fit was made of
all measurements available to us for each isotopomer. In addition to giving
the rovibrational constants for each state measured, the power series
expansion constants are also given and compared with those of the other
deuterium cyanide isotopomers. The D12C14N laser transitions are verified as
arising from the consequences of the Coriolis interaction between the J=21
levels of the 0202 and 091e0 states.