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Attractive interactions between an alkyne group and two carbonyl oxygen atoms: the crystal and molecular structure of 2,2-ethynylenedibenzoic acid at 150 K

By Melanie Pilkington, S. Tayyip and John D. Wallis


The X-ray crystal structure of 8 shows two attractive intramolecular interactions between sp carbon atoms and adjacent carbonyl oxygen atoms, leading to a twisting of the triple bond equivalent to an orthogonal combination of cis and trans bends; the two carboxylic acid groups lie to the same side of the triple bond to avoid unfavourable contacts between carbonyl oxygen atoms and incipient carbanionic centres

Topics: QD
Publisher: Royal Society of Chemistry
Year: 1994
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