Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 11 (November 2004)

gd1343 scheme

Acta Cryst. (2004). C60, o839-o842 [doi:10.1107/S0108270104023674]

The 2:1 adducts of (benzoylmethylene)triphenylphosphorane with fumaric and terephthalic acids

E. C. Spencer, M. Baby Mariyatra, J. A. K. Howard and K. Panchanatheswaran

Abstract: Co-crystals of the ylide (benzoylmethylene)triphenylphosphorane (BPPY) with either fumaric acid, viz. (benzoylmethylene)triphenylphosphorane-fumaric acid (2/1), C₂₆H₂₁OP·0.5C₄H₄O₄, or terephthalic acid, viz. (benzoylmethylene)triphenylphosphorane-terephthalic acid (2/1), C₂₆H₂₁OP·0.5C₈H₆O₄, have a stoichiometric ratio of 2:1 between the ylide and the corresponding dicarboxylic acid. In both adducts, the acid component lies across a centre of inversion. In neither case is the ylide protonated by the organic acid; instead the H atoms of the non-ionized dicarboxylic acid molecules participate in the formation of strong O-HO hydrogen bonds with the benzoyl O atom of the ylide species. These structures are the first reported examples of co-crystals containing non-protonated BPPY.

Formula: C₂₆H₂₁OP·0.5C₄H₄O₄ and C₂₆H₂₁OP·0.5C₈H₆O₄

Online 31 October 2004


	Structure factor file (CIF format) (313.4 kbytes) Contains datablock I

	Structure factor file (CIF format) (267.6 kbytes) Contains datablock II

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