NITROGEN-15 MAGNETIC RESONANCE SPECTROSCOPY. 4. THE DEGENERATE BIMOLECULAR EXCHANGE OF PROTONS IN KETIMINES

Abstract

The imine protons of nitrogen-15 labeled ketimines exhibit temperature-dependent nuclear magnetic resonances. Analysis of the effect of concentration of substrate on the mean lifetime indicates that the spectral changes result from a bimolecular exchange of protons between imines. The activation energy of this process in diphenylketimine-N15 was determined to be 13.8 = 2 kcal/mole, whereas in s-butylphenylketimine-N15, the activation energy was about 6 kcal/mole. In the latter case, separate resonances were observed for the distinct syn and anti isomers.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1965
Accession Number
AD0464462

Entities

People

  • John D. Roberts
  • Joseph B. Lambert

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alcohols
  • Chemical Synthesis
  • Chemistry
  • Contractors
  • Contracts
  • Energy
  • Governments
  • Heat Of Activation
  • Hydrogen
  • Imines
  • Jet Propulsion
  • Magnetic Resonance
  • Military Research
  • New York
  • Nuclear Magnetic Resonance
  • Organic Chemistry
  • Resonance

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Organic Chemistry