期刊
NATURE CHEMISTRY
卷 2, 期 3, 页码 202-206出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.534
关键词
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资金
- National Science Foundanon [DMR-0904034, CHE-0714851]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [904034] Funding Source: National Science Foundation
Atomic clusters often show unique, size-dependent properties and have become a fertile ground for the discovery of novel molecular structures and chemical bonding. Here we report an investigation of the B-19(-) cluster, which shows chemical bonding reminiscent of that in [10]annulene (C10H10) and [6]circulene (C24H12). Photoelecton spectroscopy reveals a relatively simple spectrum for B-19(-) is a nearly circular planar structure with a central B-6 pentagonal unit bonded to an outer B-13 ring. Chemical bonding analyses reveal that the B-19(-) cluster possesses a unique double pi-aromaticity in tow concentric pi-systems, with two pi-electrons delocalized over the central pentagonal B-6 unit another ten pi-electrons responsible for the pi-bonding between the central pentagonal unit and the outer ring. Such peculiar chemical bonding does not exist in organic compound; it can only be found in atomic clusters.
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