In:
Spectroscopy, Hindawi Limited, Vol. 15, No. 1 ( 2001), p. 19-25
Abstract:
Four tetrahydropyridocarbazole derivatives were analysed by different mass spectrometry techniques: electrospray ionization, fast atom bombardment and by low and high resolution 70 eV electron ionization. Retro Diels Alder is the main fragmentation pathway, whereas other pathways leading to [M—1] + , [M—CH 3 ] + and double charge ions also occur to considerable extents. Semi-empirical calculation provided some evidence on the nature of tropylium ions [M—1] + . Calculation of ΔHf 0 indicated that [M + —1] could be formed preferentially when a hydrogen atom is lost from the methyl substituent of the homoaromatic ring.
Type of Medium:
Online Resource
ISSN:
0712-4813
,
1875-922X
Language:
English
Publisher:
Hindawi Limited
Publication Date:
2001
detail.hit.zdb_id:
2068433-2
SSG:
11