alicyclic compound

alicyclic compound

      in chemistry, any of a large class of organic compounds in which three or more atoms of the element carbon are linked together in a ring. The bonds between pairs of adjacent atoms may all be of the type designated single bonds (involving two electrons), or some of them may be double or triple bonds (with four or six electrons, respectively); six-membered rings for which a system of alternating single and double bonds may be envisioned, however, belong to another important class (aromatic compounds (aromatic compound)), distinguished from the alicyclic compounds by a characteristically different pattern of chemical reactivity. Those alicyclic compounds in which the ring contains three or four carbon atoms are less stable than the compounds having larger rings, because the angles formed by adjacent covalent bonds are smaller than is necessary for maximum effectiveness. In the larger rings all the bond angles have the preferred value (about 109.5°); consequently, the atoms in the ring do not lie in one plane. Similar restrictions on the angles in double and triple bonds affect the stability of alicyclic compounds containing such bonds.

* * *

Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Alicyclic compound — An alicyclic compound is an organic compound that is both aliphatic and cyclic. They contain one or more all carbon rings which may be either saturated or unsaturated, but do not have aromatic character. [GoldBookRef |title=Alicyclic compounds… …   Wikipedia

  • alicyclic compound — aliciklinis junginys statusas T sritis chemija apibrėžtis Organinis junginys, turintis nearomatinį, tik iš C atomų sudarytą žiedą. atitikmenys: angl. alicyclic compound rus. алициклическое соединение …   Chemijos terminų aiškinamasis žodynas

  • alicyclic compound — noun an aliphatic compound that contains a ring of atoms • Hypernyms: ↑aliphatic compound …   Useful english dictionary

  • compound — 1. In chemistry, a substance formed by the covalent or electrostatic union of two or more elements, generally differing entirely in physical characteristics from any of its components. 2. In pharmacy, denoting a preparation containing several… …   Medical dictionary

  • alicyclic — Denoting an a. compound. * * * al·i·cy·clic .al ə sī klik, sik lik adj of, relating to, or being an organic compound that contains a ring but is not aromatic compare ALIPHATIC * * * al·i·cy·clic (al″ĭ sikґlik) ( siґklik) having the… …   Medical dictionary

  • alicyclic — /æləˈsaɪklɪk/ (say aluh suyklik), / ˈsɪk / (say sik ) adjective 1. relating to or denoting an organic compound, in which some carbon atoms are connected in one or more rings. –noun 2. Chemistry such a compound. {German alicyclisch} …  

  • alicyclic — adjective Etymology: International Scientific Vocabulary aliphatic + cyclic Date: 1891 of, relating to, or being an organic compound that contains a ring but is not aromatic compare aliphatic …   New Collegiate Dictionary

  • Cyclic compound — In chemistry, a cyclic compound is a compound in which a series of atoms is connected to form a loop or ring.[1] While the vast majority of cyclic compounds are organic, a few inorganic substances form cyclic compounds as well, including sulfur,… …   Wikipedia

  • aliphatic compound — noun organic compound that is an alkane or alkene or alkyne or their derivative • Hypernyms: ↑organic compound • Hyponyms: ↑acetylene, ↑ethyne, ↑alkyne, ↑alicyclic compound, ↑alkene, ↑olefine, ↑ …   Useful english dictionary

  • heterocyclic compound — Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons,… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”