Further Mass Spectral Studies of Flavones

Article abstract of DOI:10.1002/oms.1210210305

Further evidence supporting the structure of the ⁺ ion found in the mass spectrum of flavone as being the ⁺ species was obtained by comparison of linked scan measurements performed in flavone, 3-deuteroflavone, 5,6,7,8-tetradeuteroflavone, 2',3',4',5',6'-pentadeuteroflavone and dibenzo-β-tropolone.This fragmentation process has also been demonstrated in the case of 3-methoxyflavone by high-resolution measurements, deuterium labelling, metastable decompositions and evaluation of the subspectra of 9-methoxyfluorenol, fluorenone and biphenylene.The structure of the ion at m/z 181 in the spectrum of flavone was found to be the <2-phenylbenzoxetane-1>⁺ species.