enantiomorph


enantiomorph
/i nan"tee euh mawrf'/, n. Crystall.
either of two crystals exhibiting enantiomorphism.
[ < G (1856); see ENANTIO-, -MORPH]

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      (from Greek enantios, “opposite”; morphe, “form”), also called Antimer, or Optical Antipode, either of a pair of objects related to each other as the right hand is to the left, that is, as mirror images that cannot be reoriented so as to appear identical. An object that has a plane of symmetry cannot be an enantiomorph because the object and its mirror image are identical. Molecular enantiomorphs, such as those of lactic acid, have identical chemical properties, except in their chemical reaction with other dissymmetric molecules and with polarized light. Enantiomorphs are important to crystallography (crystal) because many crystals are arrangements of alternate right- and left-handed forms of a single molecule. A complete description of the crystal specifies how the forms are mixed with each other.

      An example of a pair of substances that are enantiomorphs is the two optically active forms of tartaric acid, designated as d-tartaric acid and l-tartaric acid. The configurations of the individual molecules of these two substances have been shown to be mirror images of one another, as represented by the following projection formulas:

      The two acids have identical melting points, densities, and solubilities in optically inactive solvents and the same rates of reactions with optically inactive reagents.

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Universalium. 2010.

Look at other dictionaries:

  • Enantiomorph — (griech.) heißen Kristallformen, die sich als Teilflächner von Kristallformen mit mehreren Symmetrie Ebenen darstellen, aber selbst keine Symmetrie Ebenen haben und nicht kongruent, sondern nur »spiegelbildlich« sind (vgl. Kristall). Die Figur… …   Meyers Großes Konversations-Lexikon

  • Enantiomorph — In der Chemie bezeichnet die Chiralität (griechisches Kunstwort, die Händigkeit, abgeleitet vom Wortstamm χειρ , ch[e]ir hand ), in der Kristallographie auch Enantiomorphie genannt, die räumliche Anordnung von Atomen, bei denen bestimmte… …   Deutsch Wikipedia

  • enantiomorph — noun Etymology: Greek enantios opposite (from enanti facing, from en in + anti against) + International Scientific Vocabulary morph morph Date: 1885 1. enantiomer 2. either of a pair of crystals (as of quartz) that are structural mirror images •… …   New Collegiate Dictionary

  • enantiomorph — noun a) Mirror image, form related to another as an object is to its image in a mirror. b) Either of a pair of crystals that are mirror images of each other, and are optically active …   Wiktionary

  • enantiomorph — An enantiomer in crystal form. * * * en·an·tio·morph in ant ē ə .mȯrf n ENANTIOMER en·an·tio·mor·phic .ant ē ə mȯr fik or en·an·tio·mor·phous fəs adj en·an·tio·mor·phism mȯr .fiz əm …   Medical dictionary

  • enantiomorph — en|an|ti|o|morph <zu ↑...morph> in zwei spiegelbildlichen Modifikationen vorkommend …   Das große Fremdwörterbuch

  • enantiomorph — [ɪ nantɪə(ʊ)mɔ:f, ɛ ] noun each of two crystalline or other geometrical forms which are mirror images of each other. Derivatives enantiomorphic adjective enantiomorphism noun enantiomorphous adjective Origin C19: from Gk enantios opposite + …   English new terms dictionary

  • enantiomorph — en·an·ti·o·morph …   English syllables

  • enantiomorph — en•an•ti•o•morph [[t]ɪˈnæn ti əˌmɔrf[/t]] n. cry either of a pair of chemically identical crystals that are mirror images of each other • Etymology: < G (1856); see enantio , morph en•an ti•o•mor′phism, n …   From formal English to slang

  • enantiomorph — /ɛˈnæntiəˌmɔf/ (say e nanteeuh.mawf) noun → enantiomer. –enantiomorphic, enantiomorphous, adjective …   Australian English dictionary


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