A monoclinic polymorph of 4,4′-dichloro-2,2′-(piperazine-1,4-diyldimethylene)diphenol
The titile compound, C18H20Cl2N2O2, crystallizes as a monoclinic form in the space group P21/n, with Z′ = 1/2. It is polymorphic with the previously reported orthorhombic form [Kubono, Tsuno, Tani & Yokoi (2008). Acta Cryst. E64, o2309]. In the present polymorph, the molecule lies...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Union of Crystallography
2008-12-01
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| Series: | Acta Crystallographica Section E |
| Online Access: | http://scripts.iucr.org/cgi-bin/paper?S1600536808038750 |
| Summary: | The titile compound, C18H20Cl2N2O2, crystallizes as a monoclinic form in the space group P21/n, with Z′ = 1/2. It is polymorphic with the previously reported orthorhombic form [Kubono, Tsuno, Tani & Yokoi (2008). Acta Cryst. E64, o2309]. In the present polymorph, the molecule lies on a crystallographic inversion centre at the piperazine ring centroid. An intramolecular O—H...N hydrogen bond forms an S(6) ring motif. Intermolecular C—H...O hydrogen bonding generates a C(5) chain motif propagating along the b axis, forming sheets parallel to (overline{2}02) with a first-level graph set S(6)C(5)R66(34). |
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| ISSN: | 1600-5368 |