structural isomer
Isomer I"so*mer ([imac]"s[-o]*m[~e]r), n. [See {Isomeric}.] (Chem.) A compound which is isomeric with another body or compound; a compound having the same chemical composition as another compound; a member of an isomeric series. [1913 Webster +PJC]

Note: An isomer may be a {structural isomer}, in which some of the atoms are bonded to different atoms (as in {CH3.CH2.NH2} and {CH3.NH.CH3}), or an {optical isomer}, in which the number and types of chemical bonds are identical, but the arrangement of the atoms in three-dimensional space is different; the latter are also called {stereoisomers}. [PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Structural isomer — Structural isomerism, or constitutional isomerism (per IUPAC), is a form of isomerism in which molecules with the same molecular formula have bonded together in different orders, as opposed to stereoisomerism.[1] There are multiple synonyms for… …   Wikipedia

  • structural isomer — n one of two or more compounds that contain the same number and kinds of atoms but that differ significantly in their geometric arrangement structural isomerism n …   Medical dictionary

  • structural isomer — noun either one of a number of compounds that exhibit structural isomerism …   Wiktionary

  • structural isomer — noun : a compound that exhibits structural isomerism …   Useful english dictionary

  • structural isomer — noun Date: 1926 one of two or more compounds that contain the same number and kinds of atoms but that differ significantly in their geometric arrangement …   New Collegiate Dictionary

  • Isomer — I so*mer ([imac] s[ o]*m[ e]r), n. [See {Isomeric}.] (Chem.) A compound which is isomeric with another body or compound; a compound having the same chemical composition as another compound; a member of an isomeric series. [1913 Webster +PJC] Note …   The Collaborative International Dictionary of English

  • Isomer — This article is about the chemical concept. For isomerism of atomic nuclei, see nuclear isomer. In chemistry, isomers (from Greek ἰσομερής, isomerès; isos = equal , méros = part ) are compounds with the same molecular formula but different… …   Wikipedia

  • isomer — noun /ˈaɪ.sə.mə,ˈaɪ.sə.mɚ/ a) Any of two or more compounds with the same molecular formula but with different structure. b) Any of two or more atomic nuclei with the same mass number and atomic number but with different radioactive properties.… …   Wiktionary

  • isomer — 1. One of two or more substances displaying isomerism (q.v.); e.g., l glucose and d glucose or citrate and isocitrate. Cf.:stereoisomer. 2. One of two or more nuclides having the same atomic and mass numbers but differing in energy states for a… …   Medical dictionary

  • isomer — noun Etymology: International Scientific Vocabulary, back formation from isomeric Date: 1855 1. one of two or more compounds, radicals, or ions that contain the same number of atoms of the same elements but differ in structural arrangement and… …   New Collegiate Dictionary

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