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Web Book Home Page | Chemogenesis Main Index Foreword: Chemogenesis & Chemical Education Part I Atoms | Elements | Periodic Tables 1.1 Introduction to Chemogenesis 1.2 Nucleosynthesis of The Elements 1.3 The Segrè Chart 1.4 Quantum Numbers to Periodic Tables 1.5 The Periodic Table: What Is It Showing? 1.6 The INTERNET Database of Periodic Tables 1.7 Periodicity Part II Structure | Bonding | Material Type 2.1 Mono-Bond Typed Binary Compounds 2.2 Binary Compound Synthlet 2.3 Electronegativity 2.4 van Arkel-Ketelaar Triangles of Bonding 2.5 Tetrahedra of Structure, Bonding & Material Type 2.6 Structure, Bonding & Material Synthlet 2.7 The Classification of Matter: Chemical Stuff Part III Interactions | Reactions | Mechanisms 3.1 The Chemogenesis Analysis: An Overview 3.2 Lewis and Brønsted Models of Acidity 3.3 The Hard Soft [Lewis] Acid Base Principle 3.4 Main Group Elemental Hydrides 3.5 Five Hydrogen Probe Experiments 3.6 Congeneric Dots, Series & Planars 3.7 Quantifying Congeneric Behaviour 3.8 Ligand Replacement Congeneric Series 3.9 Congeneric Array Interactions 3.10 Emergence of Organic Chemistry 3.11 Congeneric Array Database 3.12 The Five Reaction Chemistries 3.13 Lewis Acids & Lewis Bases: A New Analysis 3.14 The Lewis Acid/Base Interaction Matrix 3.15 Patterns in Reaction Chemistry Poster 3.16 Lewis Acid/Base Interaction Matrix Database 3.17 Nucleophiles, Bases & The Fluoride Ion 3.18 Redox Chemistry 3.19 Redox Chemistry Synthlet 3.20 Radical Chemistry 3.21 Diradical Chemistry 3.22 Photochemistry 3.23 Species/Species Interactions 3.24 The Simplest Mechanistic Step: STAD 3.25 Unit & Compound Mechanistic Steps 3.26 The Mechanism Matrix 3.27 Addition To A Double Bond Synthlet 3.28 Pericyclic Reaction Chemistry Part IV Chemical Theory 4.1 Why Do Chemical Reactions Occur? 4.2a Thermochemistry: List Reactions Synthlet 4.2b Thermochemistry: Play With Reaction Synthlet 4.2c Thermochemistry: Bulid A Reaction Synthlet 4.3 Timeline of Structural Theory 4.4 Modern Lewis Theory 4.5 Valence Shell Electron Pair Repulsion: VSEPR 4.6 Diatomic Species by Molecular Orbital Theory 4.7 Polyatomic Species: Molecular Orbitals 4.8 Organic π-Systems 4.9 Functional Group Database Part V Complexity & Emergence 5.1 Chemistry & Complexity: Systems 5.2 Linear Chemistry Systems 5.3 Chemical Systems Prone to Complexity Part VI Extras 6.1 Chemogenesis Videos 6.2 Chemical Thesaurus Reaction Chemistry Database 6.3 Paper: Chemogenesis 6.4 Paper: Electronegativity as a Basic Elemental Property (FoC) 6.5 Workshop: What is Chemistry? 6.6 Paper: Scientific laws, Dalton’s postulates, chemical reactions
and Wolfram’s NKS (FoC) 6.7 Literature References & Further Reading

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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

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© Mark R. Leach 1999 –

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