Infrared laser spectroscopy of P2O

Abstract

The P=O stretching fundamental, ν3, of P2O has been observed using diode laser absorption spectroscopy. The P2O species was generated in situ in a multipass cell from the reaction of O atoms with white phosphorus vapor (P4). These measurements significantly extend the preliminary observation of this species and in conjunction with the results of microwave spectroscopy enable the rotational structure of the band to be reliably assigned for the first time. The (0111)←(0110) hotband is also weakly observed in this system, with many of the transitions having resolved l-type doubling. The observed data are fitted to standard models to determine the full range of rotational parameters. Band origins of 1277.6454(3) and 1274.8993(10) cm−1 are obtained for the (001)←(000) and (0111)←(0110) bands, respectively.

Infrared Diode–Laser Spectroscopy of Phosphoryl Bromide (BrPO)

“…The B and C rotational constants determined here are in good agreement with those calculated from the ab initio MP2 and DFT structures in Table 1. The DFT level of calculation has also proven remarkably successful for a number of similar phosphorus-containing triatomic molecules (8,12,13). The band origins are in reasonable agreement with the harmonic vibrational band origins found in the ab initio work, which predicts a very small isotopic dependence for this band in agreement with observations.…”

“…The molecule was generated in a fast flow system which incorporated a multipass (White) cell, as described previously (12,13). Tunable infrared radiation from a diode laser traversed the 1-m long absorption cell up to 40 times.…”

Microwave spectrum and molecular structure of PNO

“…On the other hand, knowledge of P 2 O and PNO has been quite scarce because they are less stable than N 2 O. Recently, however, high-resolution infrared diode laser spectroscopy 1,2 and microwave spectroscopy 3 were reported for the P 2 O molecule.…”

Infrared Diode Laser Spectrum of the ν1 Fundamental Band of ClBO

“…The infrared diode-laser spectrometer used for these measurements has been described extensively in previous publications (7,8). The molecule was produced by the reaction of oxygen atoms, produced in a 2.45-GHz microwave discharge in O 2 /He, with BCl 3 in a fast flow system that formed part of a 1-m-long White-type absorption cell.…”