ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The electron-impact-induced fragmentation of eight 5,10-dihydrophenarsazines and three 5,10-dihydrophenarsazine oxides proceeds by loss of the exocyclic arsenic substituents to give the stable ion (II) as the base peak followed by loss of arsenic to give a carbazole species (III). The fragmentation pattern is independent of substituents at either hetero-atom in the cases examined. Dihydrophenophosphazine oxides behave similarly but give as the base peak an ion in which the phosphoryl grouping is retained.10,11-Dihydro-5-phenyl-5H-dibenzo[b, f][1,4]azarsepine and 2,3-dihydro-1,2-diphenyl-1H-benz [c]azarsole fragment by different pathways. It is suggested that the ability of arsenic and phosphorus to sustain a positive charge by dπ-pπ bonding is the dominating factor in these fragmentations.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210031008
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