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Annual Review of Physical Chemistry

Volume 73, 2022

Probing the Nature of the Transition-Metal-Boron Bonds and Novel Aromaticity in Small Metal-Doped Boron Clusters Using Photoelectron Spectroscopy

Abstract

Photoelectron spectroscopy combined with quantum chemistry has been a powerful approach to elucidate the structures and bonding of size-selected boron clusters (B−), revealing a prevalent planar world that laid the foundation for borophenes. Investigations of metal-doped boron clusters not only lead to novel structures but also provide important information about the metal-boron bonds that are critical to understanding the properties of boride materials. The current review focuses on recent advances in transition-metal-doped boron clusters, including the discoveries of metal-boron multiple bonds and metal-doped novel aromatic boron clusters. The study of the RhB− and RhBO− clusters led to the discovery of the first quadruple bond between boron and a transition-metal atom, whereas a metal-boron triplebond was found in ReBO− and IrBO−. The ReB− cluster was shown to be the first metallaborocycle with Möbius aromaticity, and the planar ReB− cluster was found to exhibit aromaticity analogous to metallabenzenes.

Keyword(s): aromaticity, boron-metal quadruple bonds, metal-boron chemical bonding, photoelectron spectroscopy, transition-metal boride clusters, velocity-map imaging
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2022-04-20
2025-04-30
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/content/journals/10.1146/annurev-physchem-082820-113041
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Probing the Nature of the Transition-Metal-Boron Bonds and Novel Aromaticity in Small Metal-Doped Boron Clusters Using Photoelectron Spectroscopy
Annual Review of Physical Chemistry 73, 233 (2022); https://doi.org/10.1146/annurev-physchem-082820-113041
/content/journals/10.1146/annurev-physchem-082820-113041
/content/journals/10.1146/annurev-physchem-082820-113041
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