Structure and photochromism of 1,2-bis[2-methyl-5-(2-chlorophenyl)-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene, C₂₇H₁₆Cl₂F₆S₂

Abstract

C 27 H 16 Cl 2 F 6 S 2 , triclinic, P1 (no. 2), a = 8.3612(18) Å, b = 11.8991(7) Å, c = 13.3979 ( CCDC no.: 1534853The asymmetric unit of the title crystal structure is shown in the figure. The smaller component of the disordered groups are omitted for clarity. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters. Source of materialThe title compound was prepared according to the litera- recrystallized from n-hexane at room temperature to obtain colorless crystals. Experimental detailsThe hydrogen atoms were located by geometrically calculations, and their positions and thermal parameters were fixed during the structure refinement. The occupancies of the disordered carbon and chlorine atoms at the benzene rings in the molecular moiety are refined to a 0.553(2):0.447(2) ratio for C22 and C22A, C23 and C23A, C24 and C24A, C25 and C25A, C26 and C26A,C27 and C27A, Cl2 and Cl2A; a 0.816(2):0.184(2) ratio for C1 and C1A, C2 and C2A, C3 and C3A, C4 and C4A, C5 and C5A, C6 and C6A, Cl and ClA, respectively. DiscussionOrganic photochromic materials have received considerable attention because of their promising applications in the fields of optical memories and switches [2-4], full-color display [5,6], sensors [7,8], and much more. Among these photochromic compounds, diarylethenes are regarded as the best promising candidates for their reversible cyclization/cycloreversion photoreaction upon alternating irradiation with UV and visible light, which have remarkable thermal stability of the respective isomers [2], notable fatigue resistance [4], and high

Crystal structure of 4-phenyl-3-((4-phenyl-1H-1,2,3-triazol-1-yl)methyl)-1H-1,2,4-triazole-5(4H)-thione, C17H14N6S

“…The design and synthesis of novel triazole-thione bearing different aromatic moieties have become a broad area in bio-organic synthesis research [11,12]. 1,2,4-Triazoles are used as poly-chelate ligands for the synthesis of metal complexes [13].…”