期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 132, 期 45, 页码 15905-15907出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja1077365
关键词
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资金
- U.S. Department of Energy [DE-FG02-96ER14658, DE-SC002183]
- University of Minnesota Supercomputing Institute
- U.S. Department of Energy (DOE) [DE-FG02-96ER14658] Funding Source: U.S. Department of Energy (DOE)
Uranium and uranium dioxide carbonyl cations produced by laser vaporization are studied with mass-selected ion infrared spectroscopy in the C-O stretching region. Dissociation patterns, spectra, and quantum chemical calculations establish that the fully coordinated ions are U(CO)(8)(+) and UO2(CO)(5)(+), with D-4d square antiprism and D-5h, pentagonal bipyramid structures. Back-bonding in U(CO)(8)(+) causes a red-shifted CO stretch, but back-donation is inefficient for UO2(CO)(5)(+), producing a blue-shifted CO stretch characteristic of nonclassical carbonyls.
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