|Group I & II Metal Cations || |
Search for s-Lewis acid species in The Chemical Thesaurus
|FMO Topology: || |
The s-Lewis acids are the cations of the Group I alkali and Group II alkaline earth metals.
The shell-like LUMO (2s, 3s 4s 5s & 6s AOs) is superimposed upon a sphere of closed electron shells which defines the ionic radius of the cation.
|Charge: ||Positive |
|HSAB: ||Intrinsically hard. Fajans rules indicate that small highly charged cations, for example Be2+, are able to polarise anions and give polar covalent complexes. |
|Chemistry: ||Used as counter ions or spectator ions to interesting Lewis bases. Very important biochemical species. |
|Congeneric Series: || |
There are two s-LUMO series:
Group I alkali metals: Li+ Na+ K+ Rb+ Cs+
Group II alkali earth metals: Be2+ Mg2+ Ca2+ Sr2+ Ba2+
Nucleophiles & Bases
© Mark R. Leach 1999-
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