Russian Journal of General Chemistry

, Volume 78, Issue 4, pp 769–773 | Cite as

Theoretical design of planar molecules with a nona- and decacoordinate central atom



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 AlB9 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 AlB9 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.


Central Atom Boron Atom Planar Molecule Theoretical Design Boron Cluster 


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© MAIK Nauka 2008

Authors and Affiliations

  1. 1.Department of Chemistry and BiochemistryUtah State UniversityLoganUSA

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