Reference

Chromogenic compounds for use in pressure-sensitive recording materials

Chromogenic compounds for use in pressure-sensitive recording materials. Farber, Sheldon (NCR Corp., USA). Ger. Offen. DE 2615035 4 Nov 1976, 26 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07D491-00. PRIORITY: US 75-566854 10 Apr 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Title compds., giving blue to red colors when in contact with acidic substrates, have the general structure I, where R is 1-ethyl-2-methyl-1H-benz[g]indol-3-yl, 1-ethyl-2-methylindol-3-yl (R1), or p-(dialkylamino)phenyl and A is a benzene, tetrachlorobenzene, pyridine, or pyrazine residue. I (R = R1, A = benzene) [61433-57-6], giving a red color, was prepd. by heating 1-ethyl-2-methyl-1H-benz[g]indole [61433-53-2] with 1-ethyl-2-methyl-3-(2-carboxybenzoyl)indole [51389-84-5] in Ac2O at 85.degree.. Seven other I were similarly prepd.Except for chemicals metioned above, 4744-50-7 and 61433-46-3 are also used. .

Pyrazine-fused extended donors, BDTFP, EDT-BDTFP, and BEDT-BDTFP: novel donors and their conducting complexes

Pyrazine-fused extended donors, BDTFP, EDT-BDTFP, and BEDT-BDTFP: novel donors and their conducting complexes. Takahashi, Kazuko; Ise, Toshihiro (Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan). Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals, 380, 183-188 (English) 2002 Taylor & Francis Ltd. CODEN: MCLCE9. ISSN: 1058-725X. DOCUMENT TYPE: Journal CA Section: 76 (Electric Phenomena) Section cross-reference(s): 28, 78 Novel pyrazine-fused extended donors, BDTFP, EDT-BDTFP, and BEDT-BDTFP were synthesized by convenient methods. [BDTFP][TCNQ] is metallic down to 150 K [BDTFP]2[PF6][PhCl]0.5 showed room temp. cond. 4744-50-7 which is the cas registry number of one of substances is just one of reagents here. of 40 S cm-1. .