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Issue 3, 2003
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Möbius aromaticity in bipyramidal rhodium-centered bismuth clusters

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Abstract

The chemical bonding topologies in the mixed rhodium–bismuth clusters [RhBi6(µ-X)12]3− (X = Br, I) and RhBi7Br8 are compared. The octahedral cluster [RhBi6(µ-X)12]3− can be considered as a d6 Rh(III) complex containing six equivalent BiX2 ligands with interligand halogen bridging but no Bi–Bi bonding. However, the pentagonal bipyramidal cluster RhBi7Br8 has only two similar BiBr2 ligands in the axial positions. The five equatorial bismuth atoms in RhBi7Br8 form a bonding pentagon, which is an example of a five-atom Möbius aromatic system with a five-center four-electron bond. This unusual bond involves σ-type overlap between p orbitals in the plane of the pentagon with the single phase change required for Möbius aromaticity.

Graphical abstract: Möbius aromaticity in bipyramidal rhodium-centered bismuth clusters

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Article information


Submitted
19 Nov 2002
Accepted
03 Dec 2002
First published
08 Jan 2003

Dalton Trans., 2003, 395-397
Article type
Paper

Möbius aromaticity in bipyramidal rhodium-centered bismuth clusters

R. B. King, Dalton Trans., 2003, 395
DOI: 10.1039/B211440M

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