X-ray crystal structure of C.I. Disperse Brown 1

Single crystal X-ray structure of C.I. Disperse Yellow 3

“…860 (4) 7683 (2) 1039 (2) 22(1) C(4) À121(4) 8571 (3) 1279 (2) 27(1) C (5) 108 (4) 9262 (3) 2169 (2) 26(1) C (6) 1355 (4) 9076 (2) 2849 (2) 23(1) C (7) 2335 (4) 8209 (3) 2617 (2) 24(1) C (8) 2097 (4) 7494 (3) 1719 (2) 25(1) C (9) 1047 (4) 11228 (3) 4878 (2) 24(1) C(10) 5(4) 12091 (3) 5061 (2) 26(1) C (11) 185 (4) 12863 (3) 5925 (2) 26(1) C (12) 1439 (4) 12738 (3) 6630 (2) 29(1) C (13) 2492 (4) 11898 (3) 6470 (2) 31(1) C (14) 2327 (4) the acetonitrile solution of the purified dye after two weeks of storage in a refrigerator. The crystal used exists in the triclinic space group P-1.…”

“…As part of a research study concerning the structure/function relationships of dye molecules, we have reported the crystal structures of several types of disperse dyes such as monoazo [12,13], methine [14] and anthraquinone [15] classes. As a continuation of this research, we describe herein the crystal structure of C.I.…”

Synthesis and X-ray analysis of a perfluoroalkyl-substituted azobenzene dye

“…Regarding other key structural components of dye 2b, the N1eN2eC7eC12 torsion angle is À13.9 and the C4eC13eC14 bond angle of 114.7 , indicating that the 4-perfluoroalkyl group is not coplanar with phenyl ring A, unlike the 4-NO 2 group of dyes such as 4e7 [5,11]. As illustrated in Table 2, this influences the l max of arylazoaminobenzene dyes.…”

“…2 structure that the aminoazobenzene framework of the perfluoroalkyl-substituted dye is significantly nonplanar, with an N2eN1eC1eC2 torsion angle of 30.6 . This contrasts the various examples of monoazo hydrophobic dye structures reported in the Cambridge Crystallographic Database (CCD, 2008), where it can be seen that azobenzene compounds having bulky ortho-substituents are typically nonplanar [11,19], while those lacking or having small ortho-substituents are nearly planar (cf. Fig.…”

Crystal structures of C.I. Disperse Red 65 and C.I. Disperse Red 73

“…Furthermore, the demand for the development of new functional dyes also requires additional information including the structural conformations of already existing dyestuff in molecular level. As a part of research program for the structure/function relationships of the dye molecules, we have reported the crystal structures of several types of disperse dyes such as monoazo [12][13][14], methine [15] and anthraquinone [16] dyes. In particular, disperse azo dyes have been continuously used in the paper, foodstuffs and leather as well as textile industry [1].…”