Niedermolekulare Phosphorsulfide in der Gasphase

Low‐Molecular Phosphorus Sulfides in the Gas Phase Ionized low‐molecular phosphorus sulfides, viz. PS + , PS   2 + , and P 2 S   2 +˙are generated by electron‐impact (EI) fragmentation of P 4 S 10 . The results of collisional‐activation (CA) mass spectra and semiempirical MO calculations suggest a linear structure for SPS + ( D ∞; h ) and a ring structure for P 2 S   2 +˙( D 2h ). As shown by neutralization‐reionization mass spectrometry (NRMS) all the ions mentioned above can be reduced to the corresponding neutral molecules. Thus, low‐coordinated phosphorus sulfides containing multiple‐bond systems prove to be stable molecules in the dilute gas phase.