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Embryonic brass: pseudo two electron Cu/Zn clusters

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Abstract

The isoelectronic M7 clusters [Cu3Zn4](Cp*)5 (1) and {[Cu2Zn5](Cp*)5}+ (2) are described. While 1 can be isolated only as a minor side product from the reaction of Cu(CH3CO2) with equimolar amounts of [Zn2Cp*2] with the trigonal cluster [CuZn2](Cp*)3 as the major product, 2 is available in acceptable yields from the reaction of [CuZn2](Cp*)3 with the Cp*Zn2-transfer-reagent [Cp*Zn2(Et2O)3][BAr4F]. The trigonal bipyramidal Cu/Zn-clusters exhibit exceptional bonding situations: with formally only one skeleton electron pair they can be regarded as highly electron deficient. However, a detailed DFT analysis reveals that the cluster bonding is supported by 3d orbital contributions of the trigonal metal base unit. The data contribute to the development of an advanced tool-box for synthesis of Hume-Rothery intermetallic (e.g. brass) inspired clusters.

Graphical abstract: Embryonic brass: pseudo two electron Cu/Zn clusters

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Publication details

The article was received on 01 Sep 2018, accepted on 26 Oct 2018 and first published on 01 Nov 2018


Article type: Edge Article
DOI: 10.1039/C8SC03902J
Citation: Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Embryonic brass: pseudo two electron Cu/Zn clusters

    H. Banh, J. Hornung, T. Kratz, C. Gemel, A. Pöthig, F. Gam, S. Kahlal, J. Saillard and R. A. Fischer, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C8SC03902J

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