NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
NMR characterization of functional groups: 9--isomer ratios of available chloromethylstyrene mixturesFrom the assignments of the 1H and 13C 11.7 tesla NMR spectra of available mixtures of m- and p-chloromethylstyrene, the proportion of the meta and para compounds are easily determined. For these materials from two common commercial sources, proportions of 72 and 28% and 68 and 32% were found. These concentrations are substantially different from the often assumed 60 and 40% for the meta and para compounds, respectively. The influence of this difference on the desired properties of copolymers made from such mixtures is discussed. An alternative quantitative procedure for determining the chloromethyl group isomer ratios is also described which employs silver trifluoroacetate in acetone displacement of chloride and 19F NMR examination of the resulting ester mixture with a 2.3 tesla spectrometer.
Document ID
20040088781
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Manatt, S. L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena CA United States)
Khune, G. D.
Khatri, N. A.
Date Acquired
August 21, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Magnetic resonance in chemistry : MRC
Volume: 23
Issue: 3
ISSN: 0749-1581
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: GM 25908
CONTRACT_GRANT: CHE79-16324
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available