Noun
The state, quality, or relation, of two or more isomeric substances.
Source: Webster's dictionaryAnd, indeed, it was not until 1936 that the young physicist Carl Friedrich von Weizsäcker succeeded in providing a theoretical explanation of the phenomenon of nuclear isomerism. Source: Internet
A related type of isomerism in octahedral MX 3 Y 3 complexes is facial–meridional (or fac/mer) isomerism, in which different numbers of ligands are cis or trans to each other. Source: Internet
Cis–trans and E-Z isomerism main Stereoisomerism about double bonds arises because rotation about the double bond is restricted, keeping the substituents fixed relative to each other. Source: Internet
Cis and trans descriptors are not used for cases of conformational isomerism where the two geometric forms easily interconvert, such as most open-chain single-bonded structures; instead, the terms “syn” and “anti” would be used. Source: Internet
Alicyclic compounds can also display cis–trans isomerism. Source: Internet
Chain isomerism In chain isomerism, or skeletal isomerism, components of the (usually carbon) skeleton are distinctly re-ordered to create different structures. Source: Internet