Approaches to wired terpyridine: Bithienyl alkynyl derivatives of 2,2 ':6 ',2 ''-terpyridine and their ruthenium(II) complexes

作者：Constable Edwin C; Figgemeier Egbert; Housecroft Catherine E^*; Medlycott Elaine A; Neuburger Markus; Schaffner Silvia; Reymann Sebastien

来源：Polyhedron, 2008, 27(18): 3601-3606.

DOI：10.1016/j.poly.2008.09.002

• Alkyne
• 2,2 ':6 ',2 ''-Terpyridine
• Heterocyclic
• Coordination
• Ruthenium
• Thienyl

Two approaches to the formation of ruthenium(II) complexes containing ligands with conjugated 2,2':6',2"-terpyridine (tpy), alkynyl and bithienyl units have been investigated. Bromination of 4'-(2 2',bithien-5'-yl)-2,2':6',2"-terpyridine leads to 4'-(5-bromo-2,2'-bithien-5'-yl)-2,2':6',2"-terpyridine (1), the single crystal structure of which has been determined. The complexes [Ru(1)(2)][PF(6)](2) and [Ru(tpy)(1)][PF(6)](2) have been prepared and characterized. Sonogashira coupling of the bromo-substituent with (TIPS)C CH did not prove to be an efficient method of preparing the corresponding complexes with pendant alkynyl units. The reaction of 4'-ethynyl-2,2':6',2"-terpyridine with 5-bromo-2,2'-bithiophene under Sonoashira conditions yielded ligand 2, and the heteroleptic ruthenium(II) complex [Ru(2)9 (tpy)][PF(6)](2) has been prepared and characterized.

• 出版日期2008-12-12