Tetraphenylphosphonium hydrogen oxalate

Tetraphenylphosphonium hydrogen oxalate

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In the title compound, C24H20P+·C2HO4−, two symmetry-independent ion pairs are Din Rail Enclosures present.The cations aggregate into puckered sheets via zigzag infinite chains of sixfold phenyl embraces and parallel fourfold phenyl embraces, while the anions form hydrogen-bonded chains between the sheets of cations.In the two independent oxalate anions, the angles between the normals to the two least-squares carboxylate Cookies COO planes are unusually large, viz.

72.5 (1) and 82.1 (1)°.