crystal structures of three co-crystals of 1,2-bis(pyridin-4-yl)ethane with 4-alkoxybenzoic acids: 4-ethoxybenzoic acid–1,2-bis(pyridin-4-yl)ethane (2/1), 4-n-propoxybenzoic acid–1,2-bis(pyridin-4-yl)ethane (2/1) and 4-n-butoxybenzoic acid–1,2-bis(pyridin-4-yl)ethane (2/1)

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ID: 161103
2015
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Abstract
The crystal structures of three hydrogen-bonded co-crystals of 4-alkoxybenzoic acid–1,2-bis(pyridin-4-yl)ethane (2/1), namely, 2C9H10O3·C12H12N2, (I), 2C10H12O3·C12H12N2, (II), and 2C11H14O3·C12H12N2, (III), have been determined at 93, 290 and 93 K, respectively. In (I), the asymmetric unit consists of one 4-ethoxybenzoic acid molecule and one half-molecule of 1,2-bis(pyridin-4-yl)ethane, which lies on an inversion centre. In (II) and (III), the asymmetric units each comprise two crystallographically independent 4-alkoxybenzoic acid molecules and one 1,2-bis(pyridin-4-yl)ethane molecule. In each crystal, the two components are linked by O—H...N hydrogen bonds, forming a linear hydrogen-bonded 2:1unit of the acid and the base. Similar to the structure of 2:1 unit of (I), the units of (II) and (III) adopt nearly pseudo-inversion symmetry. The 2:1 units of (I), (II) and (III) are linked via C—H...O hydrogen bonds, forming tape structures.
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Authors ;Yohei Tabuchi;Kazuma Gotoh;Hiroyuki Ishida
Journal Disability and rehabilitation
Year 2015
DOI
10.1107/S2056989015019349
URL
http://scripts.iucr.org/cgi-bin/paper?S2056989015019349
Keywords
1 crystal structure hydrogen-bonded liquid crystalchemistry

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