Congeneric Dots, Series & Planars
Congeneric behaviour linear or predictable structure and reactivity traits, an extension of the well known idea of periodicity is explored amongst the products of the hydrogen probe experiments, as discussed on the previous page. Sets of chemical species with similar structure and/or behaviour are identified.
Congeneric Behaviour Amongst Simple Species
The main group elemental hydrides and the products of the hydrogen probe experiments can be explored for congeneric dots, series and planars, for types of reactivity behaviour and for regions linear reactivity:
Onium Ions, Hydrides, Conjugate Bases, Enium Ions, Radicals and their Congeneric Series
The hydrogen probe experiments generate several, general types of reactive species and associated reaction behaviour: onium Ions, anionic conjugate bases, enium Ions, radicals, metals and metal cations.
A word about onium ions and enium ions:
Collections of congeneric series from the periodic table groups show how onium ion, anionic conjugate base, enium Ion and radical characteristics have common features.
These collections of congeneric species show the rich patterns of behaviour that can be found within reaction chemistry space.
The Congeneric Array Database
Search for congeneric arrays using the database page, here. For example:
The Hydrogen Series, including Deuterium & Tritium, here:
The Group 14 Series, here:
Linear Alkene Series, Methane (for comparison), Ethene, Propene & Butadiene, here:
Cyclic π-System Series: Cyclopentadiene, Benzene & the Benzyl System, here:
Grouping Congeneric Series by Geometry
Valence shell electron pair repulsion (VSEPR) theory recognises that the spatial arrangement of bonds around an atomic centre is correlated with the number of ligands and electron lone pairs, and that these are to be found at or near the vertices of regular polyhedra.
Ligand-electron pair configurations can be represented with the AXE system. Several geometries are commonly found:
Search for congeneric arrays, here.
© Mark R. Leach 1999-
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