Methyl group hopping reorientation and the non-existence of spin symmetry species at room temperature

✍ Scribed by S. Clough

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 397 KB
• Volume: 80
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(81)80134-0

✦ Synopsis

A series of experiments is discussed which, it has been claimed, demonstrate that hmdered methyl groilps exist at room temperature as relatively long-lived proton spin symmetry species. It is concluded that this concept lacks a theoretical foundation, conflicts with the model of random hopping reonentation between localised states, and leads to physically implausible predictions.