High-resolution infrared study of PHD2:: The P-H stretching bands ν1 and 2ν1

For the first time the infrared spectrum of PHD2 was recorded in the region of the PH stretching fundamental nu(1) at 2324.005 cm(-1) and the overtone 2nu(1) at 4563.634 cm(-1) with a resolution of 4,2 x 10(-3) cm(-1) I and 8.8 x 10-3 cm(-1), respectively. In the analyses about 1340 and 1020 transitions were assigned to the corresponding nu(1) and 2nu(1) bands, which provided 316 and 248 upper energies, respectively. Since both the bands are sufficiently isolated, a standard Watson-type Hamiltonian (A-reduction Y-representation) was employed. The obtained sets of spectroscopic parameters correlate very well both with each other. and with the corresponding parameters of the ground vibrational (C) 2002 Elsevier Science (USA).