The microwave spectrum of phosphaethene, CH2PH

Abstract

A detailed assignment and accurate analysis of the R-band microwave spectrum of phosphaethene CH₂PH, has been carried out and the rotational constants A₀= 138 503·20(21), B₀= 16 418·105(26), and C₀= 14 649·084(28) were derived together with all five quartic centrifugal distortion coefficients; this simplest phospha-alkene has been obtained by pyrolysis of SiMe₃CH₂PH₂(at 710 °C) as well as of (CH₃)₂PH and CH₃PH₂(at 1000°C), though less efficiently.