Alkali metals clusters, chemical bonds

Analysis of chemical bond in metal clusters I. Alkali metal and alkaline earth metals... 

KEYWORDS alkali metal, alkaline earth metal, chemical bond, cluster, structure optimization... 

Analysis of Chemical Bond in Metal Clusters 1. Alkali Metal and Alkaline Earth Metals 239... 

These results, still in a preliminary state, beautifully conform to the intuitive model of chemical bonding with alkali metal suboxides. The description of the characteristic clusters as quasi-free ionic units seems adequate. But in reality the / w sumrna) repulsive forces between the ions have to be compensated by a constraining field of free electrons to make the clusters stable. As a first approximation the constraining field is represented by a shielding effect of the electrons on the Rb ions leading to a reduction of the net charge of the clusters in the described calculations. 

This section briefly considers the proton H , the hydride ion H , the hydrogen molecule ion H2", the triatomic 2-electron species H3+ and the recently established cluster species The hydrogen atom has a high ionization energy (1312kJmol ) and in this it resembles the halogens rather than the alkali metals. Removal of the Is electron leaves a bare proton which, having a radius of only about 1.5 x 10 pm, is not a stable chemical entity in the condensed phase. However, when bonded to other species it is well known in solution and in... 

Reactions between Li+, Na, and K+-ion clusters with O3, N2O5, and SO2 with NO and CO were studied. In these reactions, the alkali metal ions did not play a chemical role, i.e., in forming bonds for instance. Reaction products of the reactions with NO were NO2, O2 and the alkali metal ion. In the reaction with CO, the products were CO2, O2 and the alkali metal ions. Interestingly, the measured reaction rate constants are much larger than the rate constants for the analogous gas-phase reaction in the absence of the alkali metal ion [108]. 

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