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Isomerism   Listen
Isomerism  n.  (Chem.) The state, quality, or relation, of two or more isomeric substances.
Physical isomerism (Chem.), a former term for optical isomerism.
optical isomerism (Chem.), the condition or relation of certain (isomeric) substances, which, while chemically identical (in that they have the same composition, the same molecular weights, and the same ultimate constitution), are yet physically different, as in their action on polarized light, as dextro- and laevo-tartaric acids, or the sugars galactose and glucose. In such compounds there is usually at least one unsymmetrical carbon atom and typically more than one. See Unsymmetrical.

Collaborative International Dictionary of English 0.48

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"Isomerism" Quotes from Famous Books

... one of the most important contributions to our scientific knowledge. By showing that ammonium cyanate can become urea by an internal arrangement of its atoms, without gaining or losing in weight, Whler furnished one of the first and best examples of isomerism, which helped to demolish the old view that equality of composition could not coexist in two bodies, A and B, with differences in their respective physical and chemical properties. Two years later, in 1830, Whler published, jointly ...
— Scientific American Supplement, No. 362, December 9, 1882 • Various

Words linked to "Isomerism" :   state

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