High-resolution FTIR spectroscopy of the nu(6) fundamental of methylene fluoride-d(2)

The Fourier transform infrared (IR) spectrum of the nu(6) band of methylene fluoride-d(2) (CD2F2) has been recorded with an unapodized resolution of 0 .006 cm(-1) in the frequency range 2220-2340 cm(-1). A total of 1111 IR tra nsitions of nu(6) were used with Watson's A- and S-reduced Hamiltonians in the I-Gamma representation to derive rovibrational constants for the upper state (nu(6) = 1) up to four quartic terms. This relatively unperturbed ban d was found to be of C-type with an unperturbed band centre at 2283.73996 /- 0.00007 cm(-1). (C) 2000 Elsevier Science B.V. All rights reserved.