Gasphasen‐Reaktionen, 85[1] Darstellung und Photoelektronen‐Spektrum von Ethyldithioxo‐λ5‐phosphoran H5C2‐P(=S)2

Gas‐Phase Reactions, 85[1]. – Preparation and Photoelectron Spectrum of Ethyldithioxo‐λ5‐phosphorane H5C2‐P(=S)2 The first alkyldithioxo‐λ5‐phosphorane 1a is obtained by selective monomerization of its readily accessible dimer, 2,4‐diethyl‐1,3,2λ5,4λ5‐dithiadiphosphetane‐2,4‐dithione [4 (R = C2H5)], at 970 K in the gas phase and characterized by its photoelectron spectrum, which is assigned by both Koopmans' correlation and radical‐cation state comparison with the halogen derivatives FPS2 (1b) and CIPS2 (1c).