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Dimers from α-alkoxybenzyl radicals. An NMR study

✍ Scribed by S. H. Goh; S. H. Ong; Iling Sieh

Book ID
102526186
Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
473 KB
Volume
3
Category
Article
ISSN
0749-1581

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✦ Synopsis

meso and dlDimers (ArCHOR), where R is Me, Et, 'Pr, tBu, cyclohexyl and 1-adamantyl may readily be differentiated by their NMR spectra; the benzylic protons of the meso isomer always absorb at a slightly higher field than those of the dl isomer in each of the solvents used. Differences in chemical shift are discussed in terms of preferences in conformer distribution. The formation of equal amounts of both dimers from the corresponding radical ArkHOR shows that steric and polar factors are not important in influencing the dimerization. Magnetic non-equivalence due to the presence of asymmetric centres was found in some of the compounds discussed above.

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