Unsymmetrical carbon atom
Unsymmetrical Un`sym*met"ric*al, a. 1. Wanting in symmetry, or due proportion pf parts. [1913 Webster]

2. (Biol.) Not symmetrical; being without symmetry, as the parts of a flower when similar parts are of different size and shape, or when the parts of successive circles differ in number. See {Symmetry}. [1913 Webster]

3. (Chem.) Being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom. [1913 Webster]

{Unsymmetrical carbon atom} (Chem.), one which is united at once to four different atoms or radicals. This condition usually occasions physical isomerism, with the attendant action on polarized light. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Unsymmetrical — Un sym*met ric*al, a. 1. Wanting in symmetry, or due proportion pf parts. [1913 Webster] 2. (Biol.) Not symmetrical; being without symmetry, as the parts of a flower when similar parts are of different size and shape, or when the parts of… …   The Collaborative International Dictionary of English

  • Isomerism — I*som er*ism, n. (Chem.) The state, quality, or relation, of two or more isomeric substances. [1913 Webster] {Physical isomerism} (Chem.), a former term for {optical isomerism}. {optical isomerism} (Chem.), the condition or relation of certain… …   The Collaborative International Dictionary of English

  • optical isomerism — Isomerism I*som er*ism, n. (Chem.) The state, quality, or relation, of two or more isomeric substances. [1913 Webster] {Physical isomerism} (Chem.), a former term for {optical isomerism}. {optical isomerism} (Chem.), the condition or relation of… …   The Collaborative International Dictionary of English

  • Physical isomerism — Isomerism I*som er*ism, n. (Chem.) The state, quality, or relation, of two or more isomeric substances. [1913 Webster] {Physical isomerism} (Chem.), a former term for {optical isomerism}. {optical isomerism} (Chem.), the condition or relation of… …   The Collaborative International Dictionary of English

  • 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

  • carbonium ion — /kahr boh nee euhm/ an organic ion containing a positively charged carbon atom (opposed to carbanion). [CARBON + IUM] * * * ▪ chemical ion Introduction       any member of a class of organic molecules with positive charges localized at a carbon… …   Universalium

  • organometallic compound — ▪ chemical compound Introduction  any member of a class of substances containing at least one metal to carbon bond in which the carbon is part of an organic group. Organometallic compounds constitute a very large group of substances that have… …   Universalium

  • Cyclohexane conformation — A cyclohexane molecule in chair conformation. Hydrogen atoms in axial positions are shown in red, while those in equatorial positions are in blue. A cyclohexane conformation is any of several three dimensional shapes that a cyclohexane molecule… …   Wikipedia

  • asymmetric — asymmetrically, adv. /ay seuh me trik, as euh /, adj. 1. not identical on both sides of a central line; unsymmetrical; lacking symmetry: Most faces are asymmetric. 2. (of a logical or mathematical relation) holding true of members of a class in… …   Universalium

  • Nitrite — ion with an O N O bond angle of ca. 120° …   Wikipedia

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