Infrared intensities as a quantitative measure of intramolecular interactions. Part XXVIII. Benzenethiols and methyl and t-butyl phenyl sulphides

Abstract

I.r. intensities of series of meta-substituted benzenethiols and methyl phenyl and phenyl t-butyl sulphides confirm the following order of resonance donation: SMe > SH SBu^t. The intensities of the para-substituted benzenethiols and phenyl sulphides are interpreted in terms of sulphur d-orbital acceptance when the divalent sulphur opposes a donor substituent. A scale of d-orbital-acceptor ability is given for a range of substituents.