Single crystal X-ray structure analysis for two thiazolylazo indole dyes

SEFEROĞLU Z., Ertan N., Kickelbick G., HÖKELEK T.

DYES AND PIGMENTS, cilt.82, sa.1, ss.20-25, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 82 Sayı: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.dyepig.2008.10.020
  • Dergi Adı: DYES AND PIGMENTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.20-25
  • Anahtar Kelimeler: Monoazo, Hetarylazo, Thiazolylazo indole dyes, Tautomerism, Azo-hydrazone, Crystal structure, AZO DISPERSE DYES, SPECTROSCOPIC PROPERTIES
  • Gazi Üniversitesi Adresli: Evet

Özet

To determine the tautomeric form of the hetarylazo indole dye 3-(5-methylthiazol-2-yldiazenyl)-2-phenyl-1H-indole (1), 1-methyl-3-(thiazol-2-yldiazenyl)-2-phenyl-1H-indole (2) was synthesized as a model compound and both molecules were characterized by single crystal X-ray diffraction. (1) crystallized in the monoclinic system, space group C2/c, a = 31.064(2), b = 7.4051(5), c = 27.7138(18) angstrom, beta = 97.617(1)degrees, V = 6318.9(7)angstrom(3), Z = 8, while dye 2 crystallized in the monoclinic system, space group P2(1)/n a = 11.4660(11), b = 9.8223(9), c = 14.2049(14) angstrom, beta = 97.418(2)degrees, V = 1586.4(3) angstrom(3), Z = 4. The asymmetric unit of I contains two crystallographically independent molecules, in which geometries and conformations differ slightly, while there is only one molecule in the asymmetric unit for 2. The intermolecular N-H center dot center dot center dot N hydrogen bonds in (1) link the molecules, via parallel, infinite sheets, along the a axis and stabilize the crystal structure; in 2, there is no classical intermolecular hydrogen bond. (c) 2008 Elsevier Ltd. All rights reserved.