Terpyridines Functionalised with Ferrocenyl Groups of Different Redox Potential

✍ Scribed by Ulrich Siemeling; Udo Vorfeld; Beate Neumann; Hans-Georg Stammler; Piero Zanello; Fabrizia Fabrizi de Biani

• Book ID: 101279805
• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 153 KB
• Volume: 1999
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199901)1999:1<1::aid-ejic1>3.0.co;2-w

✦ Synopsis

2Ј:6Ј,2ЈЈ-Terpyridines bearing a substituent X in the 4Ј-afforded [(3a) 2 Ru][PF 6 ] 2 (5a) and [(3b) 2 Ru][PF 6 ] 2 (5b), respectively, after precipitation with aqueous

Similarly, [(3a)Ru(tpy)][PF 6 ] 2 (6) was isolated from the reaction of 4a with 2,2Ј:6Ј,2ЈЈ-terpyridine (tpy). Compounds 3 prepared by Pd 0 -catalysed cross-coupling reactions. 3b was characterised by X-ray structure analysis. [(3a)RuCl 2 -and 5 were investigated by cyclic voltammetry, which revealed that the introduction of eight methyl groups leads (DMSO)] (4a) and [(3b)RuCl 2 (DMSO)] (4b) were obtained by reaction of [RuCl 2 (DMSO) 4 ] with 1 equivalent of 3a and 3b, to the expected cathodic shift of the E 0 Ј values of ca. 0.44 V for the ferrocenyl-centered redox processes. respectively, while the analogous reaction with 2 equivalents