作者:Edwin C. Constable、Egbert Figgemeier、Catherine E. Housecroft、Swarna Latha Kokatam、Elaine A. Medlycott、Markus Neuburger、Silvia Schaffner、Jennifer A. Zampese
DOI:10.1039/b811747k
日期:——
The reaction of triisopropylsilylethyne or trimethylsilylethyne with 4â²-(5-bromo-2-thienyl)-2,2â²:6â²,2â³-terpyridine (1) leads to 4â²-(5-triisopropylsilylethynyl-2-thienyl)-2,2â²:6â²,2â³-terpyridine (3) or 4â²-(5-trimethylsilylethynyl-2-thienyl)-2,2â²:6â²,2â³-terpyridine (4). The latter compound may be deprotected to give 4â²-(5-ethynyl-2-thienyl)-2,2â²:6â²,2â³-terpyridine (5). Treatment of the complexes [Ru(1)2][PF6]2, [Ru(tpy)(1)][PF6]2 and [Ru(2)2][PF6]2 (2 = 4â²-(4-bromo-2-thienyl)-2,2â²:6â²,2â³-terpyridine) with triisopropylsilylethyne yields the corresponding homoleptic and heteroleptic alkynylthienyl-terminated ruthenium(II) complexes, for which spectroscopic and electrochemical data are presented. The reaction of [RuCl2(DMSO)4] with 5 leads to [Ru(5)2][PF6]2, in which the tpy ligands bear conjugated thienyl and alkynyl groups; the latter can also be accessed by deprotection of [Ru(3)2][PF6]2. The single-crystal structures of ligands 2 and 4, and of [Ru(1)(tpy)][BPh4]2·1.3MeCN, [Ru(1)2][PF6]2·2MeNO2, 2[Ru(2)2][PF6]2}·5MeCN, [Ru(3)2][PF6]2 and [Ru(5)2][PF6]2·MeCN are presented, and among the homoleptic complexes, Ï-stacking interactions between thiophene and pyridine rings leading to pairs of associated cations provide a common structural motif.
(2)(tpy)][BPh4]2·1.3MeCN, [Ru(3)(ttpy)][BPh4]2·1.3MeCN, [Ru(4)(tpy)][BPh4]2·1.3MeCN, [Ru(5)(tpy)][BPh4]2·1.3MeCN, [Ru(6)(tpy)][BPh4]2·1.3MeCN, [Ru(7)(tpy)][BPh4]2·1.3MeCN, [Ru(8)(tpy)][BPh4]2·1.3MeCN, [Ru(9)(tpy)][BPh4]2·1.3MeCN, [Ru(10)(tpy)][BPh4]2·1.3MeCN, [Ru(11)(ttpy)][BPh4]2·1.3MeCN, [Ru(12)(tpy)][BPh4]2·1.3MeCN, [Ru(13)(tpy)][BPh4]2·1.3MeCN, [Ru(14)(tpy)][BPh4]2·14MeCN, [Ru(15)(tpy)][BPh4]2·14MeCN, [Ru