Polyyn-diyls capped by Ru2(ap)4 termini (ap = 2-anilinopyridinate), that is, [Ru2(ap) 4](μ-C,C′-C2m)[Ru2(ap)4] (compounds 1-5 with m = 1-4 and 6), were synthesized through either a metathesis reaction between Ru2(ap)4Cl and LiC 2mLi or a Glaser homocoupling reaction of Ru2(ap) 4(CmH) under Eglinton/Hay conditions. X-ray diffraction studies of compounds 2 and 4 revealed both the linear rigid rod topology of these compounds and the fine structural details about the Ru2 cores and polyyn-diyl chains. Cyclic and differential pulse voltammetric (CV and DPV) measurements and spectroelectrochemical studies show that reduced and oxidized forms of 1, 2, 4, and 5 are donor-acceptor systems in which the Ru2 termini are coupled to varying degrees depending upon the length of the polyyn-diyl bridge.

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Persistent URL dx.doi.org/10.1021/ja035434j
Journal American Chemical Society Journal
Xu, G.-L. (Guo-Lin), Zou, G. (Gang), Ni, Y.-H. (Yu-Hua), DeRosa, M.C, Crutchley, R, & Ren, T. (Tong). (2003). Polyyn-diyls capped by diruthenium termini: A new family of carbon-rich organometallic compounds and distance-dependent electronic coupling therein. American Chemical Society Journal, 125(33), 10057–10065. doi:10.1021/ja035434j