IDENTIFICATION OF DIMETHYLPYROPHOSPHONATE DECOMPOSITION PRODUCTS OF VX

Authors
  1. D'Agostino, P.A.
  2. Boulet, C.A.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
The detection and identification of decomposition products of chemical warfare agents can be used to investigate allegations of chemical warfare agent use or trace synthetic routes and sources. Compounds which contain a P-CH3 bond are particularly important as these compounds can provide evidence for organophosphorus nerve agents. Capillary column GC-MS analysis of a distillation fraction of O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothiolate (VX) indicated several additonal components comprising about 10% of the volatile organic content. These compounds were characterized and identified by GC-MS, GC-MS/MS and 31P NMR as O,O-diethyl dimethylpyrophosphonate and O,O-diethyl dimethylmonthionopyrophosphonatre. O,O-diethyl dimethylmonothionopyrophosphonate presented a structural isomerism ambiguity whereby the position of the sulfur atom could not be defined by MS alone. Identification of the correct structure required spectroscopic data from two different techniques, MS and 31P NMR, to confirm its structure, an important illustration of the use of multiple spectroscopic techniques for unambiguous identification in verifcation analysis.
Keywords
Nuclear resonance spectroscopy
Report Number
DRES-M-1420 — Memorandum
Date of publication
01 Mar 1994
Number of Pages
19
DSTKIM No
94-03314
CANDIS No
142369
Format(s):
Hardcopy;Originator's fiche received by DSIS

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