Wikipedia foundation.
Fenestrane — A fenestrane in organic chemistry is a type of chemical compound with a central quaternary carbon atom which serves as a common vertex for four fused carbocycles [ Fenestranes and the flattening of tetrahedral carbon Bhaskar Rao Venepalli and… … Wikipedia
List of chemical compounds with unusual names — Chemical nomenclature, replete as it is with compounds with complex names, is a repository for some very peculiar and sometimes startling names. A browse through the Physical Constants of Organic Compounds in the CRC Handbook of Chemistry and… … Wikipedia
Strain energy — In a molecule, strain energy is released when the constituent atoms are allowed to rearrange themselves in a chemical reaction or a change of chemical conformation in a way that:* angle strain, * torsional strain, * ring strain and/or steric… … Wikipedia
Tetrahedral molecular geometry — In a Tetrahedral molecular geometry a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos−1(−1/3) ≈ 109.5° when all four substituents are the same, as in CH4. This … Wikipedia
C5H4 — Cette page répertorie différents isomères, c’est à dire les molécules qui partagent la même formule brute. C5H4 est la … Wikipédia en Français
