Periodic Table
T-Shirts & more
from the
meta-synthesis



Merch Store


previous home next

Lewis Acid/Base Interaction Matrix Database


s-LUMO Lewis Acids

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. Fajan's 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+

s-LUMO Lewis acid (generic)
Barium ion

more here
Beryllium ion

more here
Calcium ion

more here
Cesium cation

more here
Lithium ion

more here
Magnesium ion

more here
Potassium ion

more here
Rubidium cation

more here
Sodium ion

more here
Strontium ion

more here


previous home next
Poster Nucleophiles & Bases

© Mark R. Leach 1999 –


Queries, Suggestions, Bugs, Errors, Typos...

If you have any:

Queries
Comments
Suggestions
Suggestions for links
Bug, typo or grammatical error reports about this page,

please contact Mark R. Leach, the author, using mark@meta-synthesis.com

This free, open access web book is an ongoing project and your input is appreciated.