Polyyn-diyls Capped by Diruthenium Termini: A New Family of Carbon-Rich Organometallic Compounds and Distance-Dependent Electronic Coupling Therein
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- 作者：Guo-Lin Xu ; Gang Zou ; Yu-Hua Ni ; Maria C. DeRosa ; Robert J. Crutchley ; and Tong Ren
- 刊名：Journal of the American Chemical Society
- 出版年：2003
- 出版时间：August 20, 2003
- 年：2003
- 卷：125
- 期：33
- 页码：10057 - 10065
- 全文大小：207K
- 年卷期：v.125,no.33(August 20, 2003)
- ISSN：1520-5126
文摘
Polyyn-diyls capped by Ru2(ap)4 termini (ap = 2-anilinopyridinate), that is, [Ru2(ap)4](
-C,C'-C2m)[Ru2(ap)4] (compounds 1-5 with m = 1-4 and 6), were synthesized through either a metathesis reactionbetween Ru2(ap)4Cl and LiC2mLi or a Glaser homocoupling reaction of Ru2(ap)4(CmH) under Eglinton/Hayconditions. X-ray diffraction studies of compounds 2 and 4 revealed both the linear rigid rod topology ofthese compounds and the fine structural details about the Ru2 cores and polyyn-diyl chains. Cyclic anddifferential pulse voltammetric (CV and DPV) measurements and spectroelectrochemical studies showthat reduced and oxidized forms of 1, 2, 4, and 5 are donor-acceptor systems in which the Ru2 termini arecoupled to varying degrees depending upon the length of the polyyn-diyl bridge.
-C,C'-C2m)[Ru2(ap)4] (compounds 1-5 with m = 1-4 and 6), were synthesized through either a metathesis reactionbetween Ru2(ap)4Cl and LiC2mLi or a Glaser homocoupling reaction of Ru2(ap)4(CmH) under Eglinton/Hayconditions. X-ray diffraction studies of compounds 2 and 4 revealed both the linear rigid rod topology ofthese compounds and the fine structural details about the Ru2 cores and polyyn-diyl chains. Cyclic anddifferential pulse voltammetric (CV and DPV) measurements and spectroelectrochemical studies showthat reduced and oxidized forms of 1, 2, 4, and 5 are donor-acceptor systems in which the Ru2 termini arecoupled to varying degrees depending upon the length of the polyyn-diyl bridge.