Energy and spectroscopic parameters of neutral and cations isomers of the CnH₂ (n = 2–6) families using high‐level ab‐initio approaches

Cationic species, previously detected from ion-induced desorption of solid methane by plasma desorption mass spectrometry (PDMS), and neutral species, are investigated using high-level ab-initio approaches. From a set of 25 cationic and 26 neutral structures belonging to C