Identification and geometry of dimers of phosphine and the hydrogen halides HCl and HBr from their rotational spectra detected by pulsed-nozzle, fourier-transform microwave spectroscopy

Abstract

The rotational spectra of dimers (PH₃,HX) formed by phosphine with the hydrogen halides (X = Cl and Br) have been detected by pulsed-nozzle, Fourier-transform microwave spectroscopy and have been interpreted in favour of a dimer gemetry belonging to the C_3v point group, with HX lying along the C₃ axis of PH₃ and oriented so that it forms a hydrogen bond to the phosphorus atom.