Electron Impact Mass Spectrometry of 2-Hydroxymethyl-3,4,5,6,7,8-hexahydro-2H-1-benzopyran-5-ones. The Unusual Presence of + Species in the Fragmentation Pattern of 4-Phenyl Derivatives

Article abstract of DOI:10.1002/oms.1210170909

The mass spectrometric behaviour of some 2-hydroxymethyl-3,4,5,6,7,8-hexyhadro-2H-1-benzopyran-5-ones is described and discussed with the aid exact mass measurements, linked scans, labelling experiments and low electron energy measurements.The unusual presence of abundant ⁺ species in the mass spectra of 4-phenyl substituted compounds is discussed in detail and a mechanism is proposed.