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Dinuclear acetylide-bridged ruthenium(ii) complexes with rigid non-aromatic spacers

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Abstract

Rigid dinuclear ruthenium complexes containing non-aromatic caged and polycyclic spacer groups were synthesised and characterised. The complexes, [trans,trans-{Ru(dmpe)2(C[triple bond, length as m-dash]CtBu)}2(μ-C[triple bond, length as m-dash]C–X–C[triple bond, length as m-dash]C)], where X = 1,4-bicyclo[2.2.2]octane (C8H12) or 1,12-p-carborane (p-C2B10H10), were formed via the metathesis of terminal organic bisacetylenes with the methylruthenium complex, [trans-Ru(dmpe)2(CH3)(C[triple bond, length as m-dash]CtBu)], under mild conditions. Electrochemical studies demonstrated electronic interactions across the non-aromatic caged and polycyclic spacers was less than in the analogous complex with an aromatic spacer group, [trans,trans-{Ru(dmpe)2(C[triple bond, length as m-dash]CtBu)}2(μ-C[triple bond, length as m-dash]C-p-C6H4-C[triple bond, length as m-dash]C)]. Mononuclear complexes, [trans-Ru(dmpe)2(C[triple bond, length as m-dash]CtBu)(C[triple bond, length as m-dash]C–X–C[triple bond, length as m-dash]CH)], were also synthesised. [trans-Ru(dmpe)2(C[triple bond, length as m-dash]CtBu)(C[triple bond, length as m-dash]C–C8H12–C[triple bond, length as m-dash]CH)] and [trans,trans-{Ru(dmpe)2(C[triple bond, length as m-dash]CtBu)}2(μ-C[triple bond, length as m-dash]C–p-C2B10H10–C[triple bond, length as m-dash]C)] were structurally characterised by X-ray crystallography.

Graphical abstract: Dinuclear acetylide-bridged ruthenium(ii) complexes with rigid non-aromatic spacers

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Supplementary files

Article information


Submitted
23 Dec 2019
Accepted
03 Feb 2020
First published
04 Feb 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

Dinuclear acetylide-bridged ruthenium(II) complexes with rigid non-aromatic spacers

S. Naik, S. Ø. Scottwell, H. L. Li, C. F. Leong, D. M. D'Alessandro and L. D. Field, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04856A

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