Premium
Electron impact fragmentation of some mixed cyclotetraphosphazenes
Author(s) -
Bamgboye T. Tunde,
Bamgboye Omolara A.
Publication year - 1985
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210200802
Subject(s) - radical , chemistry , bromine , fragmentation (computing) , chlorine , amine gas treating , medicinal chemistry , organic chemistry , computer science , operating system
The electron impact fragmentations of some cyclotetraphosphazenes are reported and discussed. The major fragmentation path involves loss of two amine radicals and one chlorine radical in the series P 4 N 4 Cl 8‐ n (NMe 2 ) n when n =2, and subsequent stages involve a ring contraction process with elimination of a P = N fragment, when n = 5 loss of amine radicals predominates on statistical grounds with little evidence of ring contraction. In the series P 4 N 4 F 8‐ n (NMe 2 ) n fragmentation is dominated by loss of amino radicals when n = 4 and loss of fluorine radicals predominates on statistical grounds when n = 2. In the series P 4 N 4 F 8‐ n X n ( n = 2 or 4, X = Cl or Br), when n = 2 and X = Br the major fragmentation path is the loss of two bromine radicals, whereas when X = Cl the more favoured path is the loss of two chlorine radicals. In both, subsequent stages involve ring contraction reactions with elimination of a PN fragment. When n = 4 and X = Br or Cl on bond energy grounds the more favoured fragmentation pattern is the loss of bromine or chlorine radicals, respectively.