THE HIGH-RESOLUTION INFRARED-SPECTRUM OF BRCL

The high-resolution infrared spectrum of Br Cl has been observed with a Fourier transform spectrometer. About 850 spectral lines for the Del ta v = 1 sequences of the four isotopic species, (BrCl)-Br-79-Cl-35, ( BrCl)-Br-81-Cl-35, (BrCl)-Br-79-Cl-37, and (BrCl)-Br-81-Cl-37 have bee n measured between 417 and 461 cm(-1). They have been fitted with a st andard deviation of 0.000 146 cm(-1) to a Dunham potential function us ing eight coefficients that included two Watson-type Delta correction terms. Dunham Y-ij coefficients have been derived for each of the four isotopic species. The equilibrium internuclear distance r(e) of BrCl is 2.136 053 28 (67) Angstrom.