A second monoclinic polymorph of 5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazine

✍ Scribed by Eltayeb, Naser Eltaher ;Teoh, Siang Guan ;Chantrapromma, Suchada ;Fun, Hoong-Kun ;Ibrahim, Kamarulazizi

• Publisher: International Union of Crystallography
• Year: 2007
• Tongue: English
• Weight: 919 KB
• Volume: 63
• Category: Article
• ISSN: 1600-5368
• DOI: 10.1107/s1600536807039463

✦ Synopsis

A second monoclinic polymorph of 5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazine, C 20 H 14 N 4 , is reported. The unit-cell dimensions and the orientation of the pyridine ring with respect to the triazine ring are different from those of the previously reported monoclinic form [Eltayeb, Teoh, Ng, Fun & Ibrahim (2007). Acta Cryst. E63, o1041-o1042]. In the crystal structure, intermolecular C-HÁ Á ÁN interactions connect the molecules into chains along the c axis. The crystal packing is also stabilized by C-HÁ Á Á and -[centroid-centroid distance 3.5917 (9) A ˚] interactions. The crystal used was twinned and the ratio of the twin components refined to 0.726 (1)/0.274 (1). Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CI2435).