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metal-organic compounds
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In the title compound, [Hg3(C6F4)3(C3H8O2)2], two O atoms from one 2-methoxyethanol ligand and one O atom from the second 2-methoxyethanol ligand coordinate three HgII atoms [Hg—O = 2.765 (7)–2.890 (8) Å] in the trimeric organomercurial Lewis acid (o-C6F4Hg)3. The hydroxy groups are involved in formation of intra- and intermolecular O—H
O hydrogen bonds; the latter link two molecules into centrosymmetric dimers. An extensive net of weak intermolecular C—HF interactions further consolidates the crystal packing.
O hydrogen bonds; the latter link two molecules into centrosymmetric dimers. An extensive net of weak intermolecular C—HF interactions further consolidates the crystal packing.data reportsOpen access
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In an attempt to grow 8-hydroxyquinoline–acetaminophen co-crystals from equimolar amounts of conformers in a chloroform–ethanol solvent mixture at room temperature, the title compound, C9H7NO, was obtained. The molecule is planar, with the hydroxy H atom forming an intramolecular O—HN hydrogen bond. In the crystal, molecules form centrosymmetric dimers via two O—HN hydrogen bonds. Thus, the hydroxy H atoms are involved in bifurcated O—HN hydrogen bonds, leading to the formation of a central planar four-membered N2H2 ring. The dimers are bound by intermolecular π–π stacking [the shortest CC distance is 3.2997 (17) Å] and C—Hπ interactions into a three-dimensional framework. The crystal grown represents a new monoclinic polymorph in the space group P21/n. The molecular structure of the present monoclinic polymorph is very similar to that of the orthorhombic polymorph (space group Fdd2) studied previously [Roychowdhury et al. (1978). Acta Cryst. B34, 1047–1048; Banerjee & Saha (1986). Acta Cryst. C42, 1408–1411]. The structures of the two polymorphs are distinguished by the different geometries of the hydrogen-bonded dimers, which in the crystal of the orthorhombic polymorph possess twofold axis symmetry, with the central N2H2 ring adopting a butterfly conformation.
N hydrogen bond. In the crystal, molecules form centrosymmetric dimers via two O—HN hydrogen bonds. Thus, the hydroxy H atoms are involved in bifurcated O—HN hydrogen bonds, leading to the formation of a central planar four-membered N2H2 ring. The dimers are bound by intermolecular π–π stacking [the shortest CC distance is 3.2997 (17) Å] and C—Hπ interactions into a three-dimensional framework. The crystal grown represents a new monoclinic polymorph in the space group P21/n. The molecular structure of the present monoclinic polymorph is very similar to that of the orthorhombic polymorph (space group Fdd2) studied previously [Roychowdhury et al. (1978). Acta Cryst. B34, 1047–1048; Banerjee & Saha (1986). Acta Cryst. C42, 1408–1411]. The structures of the two polymorphs are distinguished by the different geometries of the hydrogen-bonded dimers, which in the crystal of the orthorhombic polymorph possess twofold axis symmetry, with the central N2H2 ring adopting a butterfly conformation.
