Three isomeric 7,12-dL-nethylbenz[α]anthracene-pyridine adduct salts, namely.. the 5-N-pyridinium-7,12-dimethylbenz[α]anthracene perchlorate, the 7-N-pyridiniummethylene-12methylbenz[ α]anthracene picrate, and the 7-methyl-12-N-pyridiniummethylenebenz[ α]anthracene picrate, were studied by fast atom bombardment tandem mass spectrometry using high energy collisional-activated dissociation (CAD). The CAD mass spectra of the molecular cations and the (M - pyridine)+ ions allow one to distinguish positional isomers on the basis of daughter ion peak height ratios. The differences in the CAD mass spectra of the (M - pyridine)+ ions are probably due in part to formation of isomer-specific fused-ring tropyliumions.
|Original language||English (US)|
|Number of pages||3|
|Journal||Journal of the American Society for Mass Spectrometry|
|State||Published - May 1991|
ASJC Scopus subject areas
- Structural Biology