首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Octacoordinate Metal Carbonyls of Lanthanum and Cerium: Experimental Observation and Theoretical Calculation
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Octacoordinate Metal Carbonyls of Lanthanum and Cerium: Experimental Observation and Theoretical Calculation

机译:镧和铈的八配位金属羰基:实验观察和理论计算

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The octacoordinate metal carbonyls La(CO)_8~+ and Ce(CO)_8~+ were observed in laser vaporization of La and Ce in pure CO gas. The peak intensities in the mass spectra, the infrared photodissociation spectra, and the theoretical calculations indicate that all CO ligands in these two complexes are bonded with the central metal atoms. The CO stretching frequencies in La(CO)_8~+ and Ce(CO)_8~+ are determined to be 2110 and 2108 cm~(-1), respectively. Theoretical studies indicate that the most stable structures for La(CO)_8~+ and Ce(CO)_8~+ are an Oh geometry at its triplet state and a slightly distorted Oh geometry at its quartet state, respectively. These two complexes represent new octacoordinate metal carbonyls after previously determined U(CO)_8~+ and Y(CO)_8~+.
机译:在纯CO气体中La和Ce的激光汽化中观察到八配位金属羰基化合物La(CO)_8〜+和Ce(CO)_8〜+。质谱,红外光解离谱和理论计算中的峰强度表明,这两个配合物中的所有CO配体均与中心金属原子键合。 La(CO)_8〜+和Ce(CO)_8〜+中的CO拉伸频率分别确定为2110 cm〜(-1)和2108 cm〜(-1)。理论研究表明,La(CO)_8〜+和Ce(CO)_8〜+的最稳定结构分别为三重态的Oh几何和四重态的Oh几何。这两个络合物代表先前确定的U(CO)_8〜+和Y(CO)_8〜+之后的新的八配位金属羰基。

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