期刊
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
卷 78, 期 4, 页码 769-773出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1070363208040361
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The maximum coordination number of the central atom in planar molecules generated by now in mole-cular beams was 8. We made use of the chemical bond model developed for planar boron clusters to check the possibility of existence of planar molecules with the coordination numbers 9 and 10. The objects of or study were the AlB(9) and AlB(10)(+) clusters which have local minima corresponding to highly symmetrical D(9h) and D(10h) structures, respectively. According to our calculations, the highly symmetrical structure of AlB(9) is a global minimum or a low-lying isomer, and, therefore, it holds promise as a new ligand for coordination chemistry. The energy of the highly symmetrical structure of AlB(10)(+) with the coordination number 10 is too high, and this structure is hardly synthetically feasible. Thus, 9 is presently the maximum coordination number of an atom in a planar molecule.
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