O-H...π(arene) intermolecular hydrogen bonding in the structure of 1,1,2-triphenylethanol
Ferguson, George and Gallagher, John F. and Glidewell, Christopher and Zakaria, Choudhury M. (1994) O-H...π(arene) intermolecular hydrogen bonding in the structure of 1,1,2-triphenylethanol. Acta Crystallographica Section C, 50 (1). pp. 70-73. ISSN 0108-2701
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The 1,1,2-triphenylethanol molecule, Ph2(PhCH2)COH
(I), forms centrosymmetric dimers in the solid state.
The shortest O-..O separation, 5.837 (3)A,, is too long
for any O--H..-O hydrogen-bond formation. Instead,
there are O--H~..π(arene) interactions between the
hydroxyl group of one molecule and a phenyl group of
a centrosymmetrically related molecule. The O...C and
H-..C distances between the hydroxyl group and the
closest phenyl-ring C atom are 3.525 (4) and 2.73 (4)~,,
respectively. These intermolecular contacts are the only
driving force towards dimer formation in the solid state.
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