Long range spin-spin coupling and the mills-nixon effect

✍ Scribed by P. Madhavan Nair; G. Gopakumar

• Book ID: 104223520
• Publisher: Elsevier Science
• Year: 1964
• Tongue: French
• Weight: 354 KB
• Volume: 5
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)90380-0

✦ Synopsis

ALTHOUGH long range spin-spin coupling between benzylic and ring protons (hereafter referred to merely as "benzylic coupling*) in aromatic compounds has been investigated by a number of workers 1 , there has so far been no attempt to study the variation of this coupling with changes in r electron distribution. We wish to report here the results of such a study on some methyl substituted aromatic compounds. What prompted us most to undertake it was the realization that it would furnish the background in which a reconsideration of the old and unsettled question of the Mills-Nixon Effect' may be made. As has been pointed out by Dewar3 the theoretical treatment of McConnell' for the r-contribution to the coupling between aromatic protons may be applied to the case of *Presented at a symposium on "Physical Methods in Structure Determination" held at the National Chemical Laboratory (December 1963) under the auspices of the Chemical Research Committee of the CSIR (India).