Steric effects on mesomerism: XII). On the effective size of methyl (ene) groups, especially in ortho??xylene derivatives

R Van Helden, PE Verkade…

文献索引：van Helden et al. Recueil des Travaux Chimiques des Pays-Bas, 1954 , vol. 73, p. 39,47

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被引用次数: 11

摘要

Abstract The phenomenon mentioned in an earlier paper, viz. that a methyl group in ortho- xylene derivatives may behave as a larger substituent than the methyl group in comparable para-xylene or toluene derivatives, has been investigated more in detail with the aid of deacylation rates, ultra-violet absorption spectra, molecular refractions, and basic strengths. The phenomenon per se has been confirmed by this work. Naturally, however, it does not ...