Boron and transition metal compounds derived from 2-uroylbenzimidazole

✍ Scribed by Marie-Pierre Fialon; Efrén García-Baéz; Noemí Andrade-Lopez; Guadalupe Osorio-Monreal; Graciela Canseco-Melchor; Imelda Velázquez-Montes; Norah Barba-Behrens; Rosalinda Contreras

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 210 KB
• Volume: 10
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/(sici)1098-1071(1999)10:7<577::aid-hc11>3.0.co;2-s

✦ Synopsis

The coordination sites of 2-uroylbenzimidazole 1 toward diphenylborinic acid, as well as zinc, cadmium, copper, nickel and cobalt chlorides, bromides, and nitrates were investigated. The ligand is bonded in monodentate mode to ZnCl 2 , ZnBr 2 , CdCl 2 , CdBr 2 , and Cd(NO 3 ) 2 , and in bidentate mode to all others. With diphenylborinic acid, two heterocycles are formed; in one, the boron is bonded to imidazole and the terminal NH 2 group, and in the other the boron is bonded to imidazole and to the oxygen atom. Boron, zinc, and cadmium derivatives were studied by NMR spectroscopy. The X-ray diffraction structure of 2uroylbenzimidazole is reported.