ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The mass spectra of six highly purified violanthrene samples of class A - (benzo[rst]anthro[10,1,2-cde]pentaphen, benzo[rst]phenanthro[10,1,2-cde]pentaphene), class B - (benzo[rst]phenanthro[1,10,9-cde]pentaphene, dibenzo[a,rst]naphtho[8,1,2-cde]pentaphene) and class T - (tetrabenzo[a,cd,j,lm]perylene, tetrabenzo[de,hi,op,st]pentacene) were measured. The dependence of relative ion instensities for monovalent, divalent and trivalent ions [M]i+, [M - 2n]i+ and [M - 15]i+ (i = 1, 2, 3) showed clearly the effect of overcrowding in condensed aromatic rings, i.e. the number of H2 molecules which are readily eliminated from the molecular ions is zero for class A, one for class B, and two for class T. These numbers are the same as the number of overcrowded hydrogen atom pairs for each class.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210180304
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