title: Stability, reactivity, and aromaticity of compounds of a multivalent superatom.
abstract: In this article, we analyze the stability, reactivity, and possible aromatic behavior of two recently reported clusters (Reveles, J. U.; Khanna, S. N.; Roach, P. J.; Castleman, A. W., Jr. Proc. Natl. Acad. Sci. 2006, 103, 18405), viz., Al(7)C(-) and Al(7)O(-) in the light of the principles of the maximum hardness and minimum electrophilicity as well as the nucleus-independent chemical shift values. Stability of these clusters in the context of addition/removal of an electron or an Al atom is now clearly understood.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India. pkc@chem.iitkgp.ernet.in
authors.forename: Pratim Kumar
authors.initials: PK
authors.lastname: Chattaraj
authors.forename: Santanab
authors.initials: S
authors.lastname: Giri