Interpretation of β-hydrogen hyperfine splittings in the electron spin resonance of the 3-methyl-3-phenylbut-1-yl radical

DOI	Resolve DOI: https://doi.org/10.1021/j150653a001
Author	Search for: Ingold, K. U.¹; Search for: Nonhebel, D.C.; Search for: Wildman, T.A.¹
Name affiliation	National Research Council of Canada
Format	Text, Article
Journal title	The Journal of Physical Chemistry
ISSN	0022-3654
Volume	88
Issue	9
Pages	1675–1678
Abstract	At low temperatures the PhCMe2CH2CH2 radical preferentially adopts a conformation in which the radical center and the phenyl substituent are gauche to each other when viewed along the Cβ-Cγ bond. The β-hydrogens are magnetically nonequivalent and the magnitudes of their hyperfine splitting represent an average over rotation about the Cα-Cβ bond. On the basis of the equation αHβ= 54〈cos2 θ〉 G, we have derived a simple, two-component rotational potential which supports the suggestion that there is a weak, attractive interaction between the singly occupied Cα 2pz orbital and the π-cloud of the phenyl substituent. The conformations of some related radicals are also discussed.
Publication date	1984
Language	English
Peer reviewed	Yes
NPARC number	21276773
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Record identifier	619ba00c-ad98-4b19-bce1-3c961b387d3e
Record created	2015-10-13
Record modified	2020-03-13