plane isomerism

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• isomerism — /uy som euh riz euhm/, n. 1. Chem. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism), as CH3OCH3 and… …   Universalium

• isomerism — The existence of a chemical compound in two or more forms that are identical with respect to percentage composition but differ as to the positions of one or more atoms within the molecules, as well as in physical and chemical properties.… …   Medical dictionary

• geometric isomerism — noun A form of isomerism in which, in one isomer two atoms or groups are on the same side of the plane of a double bond or ring, whereas in the other isomer they are on opposite sides; the first is the cis and the second the trans isomer. Syn …   Wiktionary

• optical isomerism — n. a type of isomerism in which isomeric compounds differ only in the direction in which they rotate the plane of polarized light …   English World dictionary

• optical isomerism — Compounds that are mirror images and differ in turning the plane of polarized light left (L form) or right (D form) …   Dictionary of invertebrate zoology

• coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction  any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… …   Universalium

• Coordination complex — Cisplatin, PtCl2(NH3)2 A platinum atom with four ligands In chemistry, a coordination complex or metal complex, is an atom or ion (usually metallic), bonded to a surrounding array of molecules or anions, that are in turn known as ligands or… …   Wikipedia

• 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

• Complex (chemistry) — The term complex in chemistry is usually used to describe molecules or ensembles formed by the combination of ligands and metal ions. Originally, a complex implied a reversible association of molecules, atoms, or ions through weak chemical bonds …   Wikipedia

• hydrocarbon — hydrocarbonaceous, adj. /huy dreuh kahr beuhn, huy dreuh kahr /, n. any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH4, an alkene, ethylene, C2H4, an alkyne, acetylene, C2H2, or an aromatic compound,… …   Universalium

• isomer — /uy seuh meuhr/, n. 1. Chem. a compound displaying isomerism with one or more other compounds. 2. Also called nuclear isomer. Physics. a nuclide that exhibits isomerism with one or more other nuclides. [1865 70; back formation from ISOMERIC] * *… …   Universalium