Direct Experimental Observation of CS 2 OH

The first experimental detection of CS 2 OH is reported. CS 2 OH was observed for about one microsecond after its formation, as an intact isolated species in the gas phase. It was generated by electron transfer to the CS 2 OH + ion, prepared in the source of a multisector mass spectrometer by suitable ion–molecule reactions. The vertical formation process allowed characterization of CS 2 OH by structural analysis of CS 2 OH + . Theoretical calculations were performed at the B3LYP/6‐311+G(2d,p) and CCSD(T)/aug‐cc‐pVTZ//B3LYP/6‐311+G(2d,p) levels of theory. The computed structure and stability of CS 2 OH and CS 2 OH + as well as the energetics of the involved processes satisfactorily fit with the experimental results.