Abstract
Integrated i.r. intensities of both the ν8 ring-stretching and ν(CC) bands of a series of m- and p-substituted phenylacetylenes indicate that the ethynyl group is a weak resonance donor when attached to a benzene ring. The group can become a strong resonance donor or acceptor in situations of high electron demand or excess, respectively.
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More From: Journal of the Chemical Society, Perkin Transactions 2
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