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Embryonic brass: pseudo two electron Cu/Zn clusters.

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][BAr₄ ^F]. 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.

SUBMITTER: Banh H

PROVIDER: S-EPMC6301272 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature

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Embryonic brass: pseudo two electron Cu/Zn clusters.

Banh Hung H Hornung Julius J Kratz Thilo T Gemel Christian C Pöthig Alexander A Gam Franck F Kahlal Samia S Saillard Jean-Yves JY Fischer Roland A RA

Chemical science 20181101 48

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 ...[more]

PMID: 30647885

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