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. 2015 Sep 12;71(Pt 10):o754-5.
doi: 10.1107/S2056989015016862. eCollection 2015 Oct 1.

Crystal structure of tetra-kis-(1-oxidopyridin-2-yl)methane methanol tetra-solvate

Kouzou Matsumoto  1 , Kazuaki Kawashita  2 , Masaki Kannami  2 , Masaji Oda  2
Affiliations

Crystal structure of tetra-kis-(1-oxidopyridin-2-yl)methane methanol tetra-solvate

Kouzou Matsumoto et al. Acta Crystallogr E Crystallogr Commun. .

Abstract

The asymmetric unit of the title compound, C21H16N4O4·4CH3OH, consists of a quarter mol-ecule of tetra-kis-(1-oxidopyridin-2-yl)methane and one methanol solvent mol-ecule. In the crystal, the pyridine N-oxide derivative is located about a fourfold rotoinversion axis and exhibits S 4 symmetry along the c axis. An inter-molecular O-H⋯O hydrogen bond is observed between the O atom of the pyridine N-oxide and the OH group of the methanol. An inter-molecular C-H⋯O bond is also observed between adjacent pyridine N-oxide rings.

Keywords: S4 symmetry; crystal structure; hydrogen bonding; pyridine N-oxide.

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Figures

Fig. 1.
Fig. 1.
ORTEP drawing of the title compound (viewed along the b axis). Displacement ellipsoids are drawn at the 50% probability level. The hydrogen bonds are shown in the dashed lines. [Symmetry codes: (i) -x, 1/2 - y, z; (ii) -1/4 + y, 1/4 - x, 5/4 - z; (iii) 1/4 - y, 1/4 + x, 5/4 - z.]
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