Z. Seferoğlu, N. Ertan, G. Kickelbick
Jul 1, 2009
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0
Influential Citations
29
Citations
Journal
Dyes and Pigments
Abstract
Abstract To determine the tautomeric form of the hetarylazo indole dye 3-(5-methylthiazol-2-yldiazenyl)-2-phenyl-1 H -indole ( 1 ), 1-methyl-3-(thiazol-2-yldiazenyl)-2-phenyl-1 H -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 C 2/ c , a = 31.064(2), b = 7.4051(5), c = 27.7138(18) A, β = 97.617(1)°, V = 6318.9(7) A 3 , Z = 8, while dye 2 crystallized in the monoclinic system, space group P 2 1 / n , a = 11.4660(11), b = 9.8223(9), c = 14.2049(14) A, β = 97.418(2)°, V = 1586.4(3) A 3 , Z = 4. The asymmetric unit of 1 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⋯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.