Document Type

Article

Publication Date

7-2013

Publication Source

Magnetic Resonance in Chemistry

Abstract

The 3M Company product Novec™ 71IPA DL, a mixture of methoxyperfluorobutane, methoxyperfluoroisobutane and 4.5 wt.% isopropyl alcohol, has been found to be very stable at ambient temperature, producing fluoride at the rate of ~1 ppm/year. Our earlier kinetic and theoretical studies have identified the reaction mechanism. This paper identifies the 1H and 19F NMR chemical shifts, multiplicities, and coupling constants of reactants and the major products that result from aging the mixture in sealed Pyrex NMR tubes for periods up to 1.8 years at temperatures from 26 °C to 102 °C. Chemical shifts and coupling constants of fluorine and hydrogen atoms on the hydrofluoroethers and isopropyl alcohol are traced through the reactions to their values in the products – esters, isopropylmethyl ether, and HF. These spectral positions, multiplicities, and coupling constants are presented in table format and as figures to clarify the transformations observed as the samples age.

Inclusive pages

407-413

ISBN/ISSN

0749-1581

Document Version

Preprint

Comments

This is the pre-peer-reviewed version of the following article: Knachel, H. C.; Benin, V.; Moddeman, W. E.; Birkbeck, J. C.; Kestner, T. A.; Young, T. L. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Permission documentation is on file.

Publisher

John Wiley & Sons

Volume

51

Issue

7

Peer Reviewed

yes