Chain disproportionation

Chain disproportionation

In chemistry, chain disproportionation occurs when two radicals meet, instead of coupling, they exchange a proton. That gives two terminated chains, one saturated and the other with a terminal double bond [1].

2R-(CH2CH2)n-CH2CH2• → R-(CH2CH2)n-CH=CH2 + R-(CH2CH2)n-CH2CH3

References

  1. ^ Introduction to Polymers 1987 R.J. Young Chapman & Hall ISBN 0-412-22170-5

Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Chain growth polymerisation — Chain growth polymerization is a polymerization technique where unsaturated monomer molecules add on to a growing polymer chain one at a time [1]. It can be represented with the chemical equation: where n is the …   Wikipedia

  • Kinetic chain length — In polymer chemistry the kinetic chain length of a polymer, ν , is the average number of monomers added to each polymerizing radical during polymerization. During this process, a polymer chain is formed when units called monomers are bonded… …   Wikipedia

  • Radical polymerization — is a type of polymerization in which the reactive center of a polymer chain consists of a radical.The polymerization reaction is initiated by three classes of free radical initiators: * certain compounds that can be broken down in two radicals at …   Wikipedia

  • Olefin metathesis — or transalkylidenation is an organic reaction that entails redistribution of alkylene fragments by the scission of carbon carbon double bonds in olefins (alkenes).[1] Its advantages include the creation of fewer sideproducts and hazardous wastes …   Wikipedia

  • Microbial metabolism — is the means by which a microbe obtains the energy and nutrients (e.g. carbon) it needs to live and reproduce. Microbes use many different types of metabolic strategies and species can often be differentiated from each other based on metabolic… …   Wikipedia

  • Cracking (chemistry) — In petroleum geology and chemistry, cracking is the process whereby complex organic molecules such as kerogens or heavy hydrocarbons are broken down into simpler molecules such as light hydrocarbons, by the breaking of carbon carbon bonds in the… …   Wikipedia

  • Charge ordering — (CO) is a (first or second order) phase transition occurring mostly in strongly correlated materials such as transition metal oxides or organic conductors. Due to the strong interaction, the charge is localized on different sites leading to a… …   Wikipedia

  • industrial polymers, chemistry of — Introduction       structure and composition of chemical compounds made up of long, chainlike molecules (molecule).       What distinguishes polymers from other types of compounds is the extremely large size of the molecules. The size of a… …   Universalium

  • Cobalt mediated radical polymerization — Cobalt based catalysts, when used in radical polymerization, have several main advantages especially in slowing down the reaction rate, allowing for the synthesis of polymers with peculiar properties. As starting the reaction does need a real… …   Wikipedia

  • Addition polymerization — nM (monomer) ightarrow ( M ) n (polymer)where n is the degree of polymerization.CharacteristicsThe main characteristics are:* polymerisation process takes place in three distinct steps: # chain initiation, usually by means of an initiator which… …   Wikipedia

Share the article and excerpts

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