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A new polymorph of 2,5-bis­(4-pyrid­yl)-1,3,4-thia­diazole

✍ Scribed by Zhao, Xiao-Jun ;Cai, Hua ;Du, Miao

Publisher
International Union of Crystallography
Year
2005
Tongue
English
Weight
168 KB
Volume
61
Category
Article
ISSN
1600-5368

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✦ Synopsis

A new polymorph of 2,5-bis(4-pyridyl)-1,3,4-thiadiazole, C 12 H 8 N 4 S, obtained under hydrothermal conditions, is described. In this structure, the two terminal pyridyl groups are inclined to the central thiadiazole ring with dihedral angles of 6.47 (2) and 29.95 (5) , and the dihedral angle between the pyridyl ring planes is 23.65 ( 6) . An intermolecular C-HÁ Á ÁN weak interaction is observed. The structural differences of two polymorphs of 2,5-bis(4-pyridyl)-1,3,4-thiadiazole are also discussed.

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In the title compound, C 18 H 14 ClN 3 O 2 S 2 , the thiazolidine ring adopts an envelope conformation. There are intermolecular C-HÁ Á ÁO interactions, forming centrosymmetric dimers.