Ei mechanism

Ei mechanism

Ei elimination (Elimination Internal) in organic chemistry is a special type of elimination reaction in which two vicinal substituents on an alkane framework leave simultaneously in a single step to form an alkene in a syn elimination [J. March Advanced Organic Chemistry 3rd Ed. ISBN 04718544727 ] . In regular eliminations this reaction would involve a base or would in many cases involve charged intermediates. This reaction mechanism is often found in pyrolysis.

Examples are eliminations involving the Burgess reagent, Hofmann elimination (with some sterically hindered substrates), the Cope elimination and ester pyrolysis.

References


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Mechanism (philosophy) — Mechanism is the belief that natural wholes (principally living things) are like machines or artifacts, composed of parts lacking any intrinsic relationship to each other, and with their order imposed from without. Thus, the source of an apparent …   Wikipedia

  • Mechanism — • There is no constant meaning in the history of philosophy for the word Mechanism. Originally, the term meant that cosmological theory which ascribes the motion and changes of the world to some external force Catholic Encyclopedia. Kevin Knight …   Catholic encyclopedia

  • mechanism — mech‧a‧nis‧m [ˈmekənɪzm] noun [countable] a system used to achieve something or deal with a problem: • The increased lending can be done through existing lending mechanisms. • There is a move to introduce free market mechanisms in the airline… …   Financial and business terms

  • Mechanism — may refer to: Mechanism (engineering), rigid bodies connected by joints in order to accomplish a desired force and/or motion transmission Mechanism (biology), explaining how a feature is created Mechanism (philosophy), a theory that all natural… …   Wikipedia

  • Mechanism Digital — Type Private Founded April 1996 Headquarters New York, New York, USA 118W 27th St New York, New York 10001 Key people Founder: Lucien Ha …   Wikipedia

  • Mechanism — Mech an*ism, n. [Cf. F. m[ e]canisme, L. mechanisma. See {Mechanic}.] 1. The arrangement or relation of the parts of a machine; the parts of a machine, taken collectively; the arrangement or relation of the parts of anything as adapted to produce …   The Collaborative International Dictionary of English

  • mechanism of action — mech an*ism of ac tion, n. (Medicine, Biochemistry) The mechanism[2] by which a pharmacologically active substance produces an effect on a living organism or in a biochemical system; as, the mechanism of action of actinomycin involves its binding …   The Collaborative International Dictionary of English

  • mechanism — [mek′ə niz΄əm] n. [ModL mechanismus < Gr mēchanē, MACHINE] 1. the working parts or arrangement of parts of a machine; works [the mechanism of a clock] 2. a) a system whose parts work together like those of a machine [the mechanism of the… …   English World dictionary

  • Mechanism (band) — Mechanism is a death metal band from Canada (Vancouver, British Columbia). Their debut album is called Inspired Horrific and combines death metal with progressive. Contents 1 Line up 2 Discography 3 References …   Wikipedia

  • mechanism of defense — n DEFENSE MECHANISM (1) …   Medical dictionary

  • mechanism — [n1] machine, device apparatus, appliance, black box*, components, contrivance, doohickey*, gadget, gears, gimmick, innards, instrument, machinery, motor, structure, system, tool, workings, works; concept 463 mechanism [n2] means, method agency,… …   New thesaurus

Share the article and excerpts

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