期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 1, 页码 165-168出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja209808k
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资金
- National Science Foundation [DMR-0904034, CHE-1057746]
- DoE's Office of Biological and Environmental Research at Pacific Northwest National Laboratory
- USU
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1057746] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [904034] Funding Source: National Science Foundation
We report the observation of two transition-metal-centered nine-atom boron rings, Rh (c) B-9(-) and Ir (c) B-9(-). These two doped-boron clusters are produced in a laser-vaporization supersonic molecular beam and characterized by photoelectron spectroscopy and ab initio calculations. Large HOMO-LUMO gaps are observed in the anion photoelectron spectra, suggesting that neutral Rh (c) B-9 and Ir (c) B-9 are highly stable, closed shell species. Theoretical calculations show that Rh (c) B-9 and Ir (c) B-9 are of D-9h, symmetry. Chemical bonding analyses reveal that these complexes are doubly aromatic, each with six completely delocalized pi and sigma electrons, which describe the bonding between the central metal atom and the boron ring. This work establishes firmly the metal-doped B rings as a new class of novel aromatic molecular wheels.
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