Chemically induced dynamic nuclear spin polarisation in products of reactions of diphenylmethylene with benzyl fluorides: novel effects arising from intramolecular interactions of polarised 1H and 19F nuclei

Abstract

Polarised ¹⁹F n.m.r. spectra of 1,2,2-triphenylethyl fluoride, produced during the reaction of diphenylmethylene with either benzyl fluoride or α-bromobenzyl fluoride, show unusual relative line intensities and doublet splittings which are thought to stem from the coupling of the polarised ¹⁹F nucleus with a polarised vicinal proton which is undergoing nuclear spin relaxation more rapidly.