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 dibenzo-p-dioxin and group VI analogues are reported and discussed in terms of observed tendencies in the fragmentation patterns. Data for the following compounds are given: dibenzo-p-dioxin (la), phenosellenine (Ic), phenotellurine (Id), 5,5-dibromophenosellenine (Ig), 5,5-dibromophenotellurine (Ih), 3,7-dibromophenoxathiin-5,5-dioxide (II), benz-1,4-dioxin (III) and 2-hydroxybenz-1,4-dioxan (IV). Certain ions in the spectra of phenoxathiin (Ib), its sulphoxide (le) and sulphone (If) are reported for purposes of comparison. Ions formed by the loss of the heteroatom other than oxygen (i.e. group Y in the type formula I) are present in the spectra of the compounds Ia to h, but the intensities of these ions vary considerably. In the series of analogous-compounds la to d the intensity of the ion formed by loss of Y increases as the electronegativity of Y decreases. Ions formed by intial loss of CO and ·CHO are observed in the spectra of compounds la to d; the ratios of the intensities of these ions to the intensity of the ion formed by loss of Y depends on the ease of loss of Y. Compounds Ia and III lose C2O2 in a one step process to form intense aromatic radical ions.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210040113
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