Near Infrared Spectrum of DCl

The first (2—0) and second (3—0) overtones of DCl have been obtained with high dispersion in the 2.4 and 1.6 micron regions. Values for the rotational constants Be, Ie, and re are essentially in agreement with those obtained by Pickworth and Thompson for the fundamental band. The molecular constants obtained are: DCl35 DCl37Be5.4490 cm−15.432 cm−1Ie5.1354×10−40 g−cm25.1516×10−40 g−cm2re1.2744×10−8 cm1.2745×10−8 cmωe2144.77 cm−12141.20 cm−1ωexe26.92 cm−126.99 cm−1ωeye0.036 cm−10.063 cm−1These agree closely with the values calculated from the data for HCl.