Isomers
Definitions of isomers on the Web:
* A long-lived excited state of the nucleus. Arbitrarily defined in as the Table of Isotopes as having a half-life greater than 1 ms.
* Compounds with the same chemical formulas, but different structures, and therefore different chemical or physical properties.
* Molecules with identical molecular formulas but differing in the sequence of bonding or arrangement in space of their atoms, ie their structural formulas.
* When two materials with different properties and/or structures share the same chemical formula, they are said to be isomers
* compounds having the same atomic composition (constitution) but differing in their chemical structure. [They include: structural isomers (chain or positional), tautomeric isomers, and stereoisomers - including geometrical isomers, optical isomers and conformational isomers.]
* Different compounds that have the same molecular formula. All isomers fall into either of two categories - that of constitutional isomers or stereoisomers.
* compounds that have the same numbers and kinds of atoms but that differ in the way the atoms are arranged.
* are two or more compounds with identical chemical composition with respect to mass, number, and type of atoms, and which differ only in the arrangement of these atoms in space.
* Two or more chemical compounds having the same structure but different properties.
* are compounds whose molecules contain the same atoms but in different arrangements.
* (noun) molecules that are formed from the same atoms in the same chemical linkages but have different three- dimensional- conformations
* In chemistry, isomers are molecules with the same chemical formula and often with the same kinds of bonds between atoms, but in which the atoms are arranged differently. Many isomers share similar if not identical properties in most chemical contexts.