Formation of 1-phosphapropyne, CH3CP, by pyrolysis of dichloro-(ethyl)phosphine: a He(I) photoelectron spectroscopic study

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Abstract
The conditions for the isolation of 1-phosphapropyne, CH3CP, recently detected by microwave spectroscopy in the products of the gas-phase pyrolysis of PEtCl2, have been studied by photoelectron spectroscopy. Although CH3CP is not the major product it can be trapped and separated from other reaction products under controlled conditions and subsequently revaporised. The He(I) photoelectron spectrum of CH3CP has been assigned and compared with that of FCP and HCP and the related nitrogen analogues.