SPIN-ECHO NMR STUDIES OF CHEMICAL EXCHANGE. IV. INTRAMOLECULAR EXCHANGE OF A COUPLED AB SYSTEM,

Abstract

A mathematical and experimental study of the spin echo amplitudes in a Carr-Purcell train of echoes is reported for a coupled AB system undergoing intramolecular exchange. The density matrix approach was used to derive a set of four coupled recursion relations for the amplitudes of successive echoes. A program was written to investigate the properties of the system numerically with a high speed computer. Predictions were verified by F(19) spin echo experiments at 16.70 and 25.27 Mc/sec on 1,1-difluorocyclohexane in which axial and equatorial fluorines are interchanged by the chair-chair isomerization.

Document Details

Document Type
Technical Report
Publication Date
Feb 14, 1965
Accession Number
AD0612486

Entities

People

  • Adam Allerhand
  • Herbert S. Gutowsky

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Chemical Reactions
  • Computers
  • Computing Devices
  • Elements
  • Fluorine
  • Group 17 Elements
  • Isomerization

Fields of Study

  • Chemistry

Readers

  • Calculus or Mathematical Analysis
  • Organic Chemistry
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.