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Issue 3, 2016
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Copper(i) halide clusters based upon ferrocenylchalcogenoether ligands: donors, halides and semi-rigidity effects on the geometry and catalytic activity

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Abstract

Six copper(I) halide clusters based upon ferrocenyltelluroethers or ferrocenylselenoethers, 1–6, have been synthesized and structurally characterized by an X-ray crystallographic study. These structures include a discrete step-cubane Cu4I4 cluster, a 1D chain with rhomboid Cu2X2 clusters, a 1D chain with cubane Cu4I4 clusters and a 2D network with Cu2I2 clusters. 1–3 are the first structurally characterized example of copper(I) clusters with telluroethers. Their different nuclearities and geometries can be attributed to the different donor atoms and chain flexibility in the ligands. The catalytic activities of six clusters were then investigated in the Ullmann C–N cross-coupling reaction and 2 displayed the best performance with a target product N-(4-phenyl)imidazole in 91.3% yield. From the viewpoint of structure, the specific steric acceptance around Cu(I) in 2 may allow imidazole and iodobenzene to stepwise coordinate with the copper center and give the target product effectively.

Graphical abstract: Copper(i) halide clusters based upon ferrocenylchalcogenoether ligands: donors, halides and semi-rigidity effects on the geometry and catalytic activity

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Supplementary files

Article information


Submitted
12 Oct 2015
Accepted
20 Nov 2015
First published
23 Nov 2015

Dalton Trans., 2016,45, 1016-1024
Article type
Paper

Copper(I) halide clusters based upon ferrocenylchalcogenoether ligands: donors, halides and semi-rigidity effects on the geometry and catalytic activity

W. Ji, J. Qu, S. Jing, D. Zhu and W. Huang, Dalton Trans., 2016, 45, 1016
DOI: 10.1039/C5DT03993B

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