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- W2061874934 abstract "Polynuclear zinc clusters [Znx] (x>2) with multicentred Zn–Zn bonds and +1 oxidation state zinc (that is, zinc(I) or ZnI) are to our knowledge unknown in chemistry. Here we report the polyzinc compounds with an unusual cubic [ZnI8(HL)4(L)8]12− (L=tetrazole dianion) cluster core, composed of zinc(I) ions and short Zn–Zn bonds (2.2713(19) Å). The [ZnI8]-bearing compounds possess surprisingly high stability in air and solution. Quantum chemical studies reveal that the eight Zn 4s1 electrons in the [ZnI8] cluster fully occupy four bonding molecular orbitals and leave four antibonding ones entirely empty, leading to an extensive electron delocalization over the cube and significant stabilization. The bonding pattern of the cube represents a class of aromatic system that we refer to as cubic aromaticity, which follows a 6n+2 electron counting rule. Our finding extends the aromaticity concept to cubic metallic systems, and enriches Zn–Zn bonding chemistry. Zinc(I) bimetallic clusters have previously been reported, but they are not stable in air. Here, the authors synthesize octametallic Zinc(I) clusters with multi-centred zinc–zinc bonds and extensive electron delocalization over the cluster, resulting in cubic aromaticity and enhanced stability." @default.
- W2061874934 created "2016-06-24" @default.
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- W2061874934 date "2015-02-23" @default.
- W2061874934 modified "2023-10-10" @default.
- W2061874934 title "A multicentre-bonded [ZnI]8 cluster with cubic aromaticity" @default.
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- W2061874934 doi "https://doi.org/10.1038/ncomms7331" @default.
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