Canadian Journal of Chemistry p. 169 - 182 (1997)
Update date:2022-07-29
Topics:
Hanan, Garry S.
Schubert, Ulrich S.
Volkmer, Dirk
Riviere, Emmanuel
Lehn, Jean-Marie
Kyritsakas, Nathalie
Fischer, Jean
Oligo-tridentate ligands based on alternating pyridines and pyrimidines were synthesised by Stille-type carbon-carbon bond-forming reactions. The terpyridine-like sites are designed to coalign upon metal complexation, giving rise to organized and rigidly spaced metal ions. Peripheral functionalization of the basic bis-tridentate framework was explored. The heterocycles in the ligands are in an all-trans conformation about the interannular bonds as indicated by comparison of their 1H NMR spectra. An X-ray crystal structure analysis of the nonchiral tris-tridentate ligand 2a reveals a helical structure in the solid state. The seven heterocycles form a helical structure with resulting overlap of the terminal pyridines. Their centroid-to-centroid distance is 4.523 A with 38.8° between the planes. NMR investigations support a helical conformation in solution as well. Electrochemical and UV absorption measurements indicate that the LUMO resides on the pyrimidine moiety of the ligands.
View MoreBeijing Apis Biotechnology Co., Ltd.
Contact:86-010-67856775-8551
Address:NO.4PUHUANGYU ROAD,FENTAI DISTRICT, BEIJING, CHINA
Shanghai Hanhong Scientific Co.,Ltd.
website:http://www.chemvia.com
Contact:+86-21-64541543,54280654,13918533501
Address:Jiachuan Road 245
Guangzhou Probig Fine Chemical Co., Ltd.
Contact:020-86297874
Address:No.2, 1/F, No.20, Hetai Road,Hebian Village, Baiyun District,Guangzhou,China
Zibo Ocean International Trade Co.,Ltd
Contact:+86 533 5160706
Address:1117, Hongtai Bld., Songling rd, Zichuan,Zibo,Shandong,China
Yicheng Goto Pharmaceuticals Co.,Ltd.
Contact:+86 710 3423122
Address:5th Floor,East Gate of Building #2,Servo-Industrial Park,1st Qilin Road,Xiangyang,Hubei,China
Doi:10.1021/ja00134a043
(1995)Doi:10.1021/jo980194p
(1998)Doi:10.1246/bcsj.40.2925
(1967)Doi:10.1021/jo961293a
(1996)Doi:10.1021/ja961264h
(1996)Doi:10.1002/jccs.199600062
(1996)