Addition reaction






Addition of chlorine to ethylene


An addition reaction, in organic chemistry, is in its simplest terms an organic reaction where two or more molecules combine to form a larger one (the adduct).[1][2]


Addition reactions are limited to chemical compounds that have multiple bonds, such as molecules with carbon–carbon double bonds (alkenes), or with triple bonds (alkynes). Molecules containing carbon—hetero double bonds like carbonyl (C=O) groups, or imine (C=N) groups, can undergo addition, as they too have double-bond character.


An addition reaction is the reverse of an elimination reaction. For instance, the hydration of an alkene to an alcohol is reversed by dehydration.


There are two main types of polar addition reactions: electrophilic addition and nucleophilic addition. Two non-polar addition reactions exist as well, called free-radical addition and cycloadditions. Addition reactions are also encountered in polymerizations and called addition polymerization.



General overview of addition reactions. Top to bottom: electrophilic addition to alkene, nucleophilic addition of nucleophile to carbonyl and free-radical addition of halide to alkene



Addition-elimination reaction


In the related addition-elimination reaction an addition reaction is followed by an elimination reaction. In the majority of reactions it involves addition of nucleophiles to carbonyl compounds in what is called nucleophilic acyl substitution.[3]


Other addition-elimination reactions are the reaction of an aliphatic amine to an imine and an aromatic amine to a Schiff base in alkylimino-de-oxo-bisubstitution. The hydrolysis of nitriles to carboxylic acids is also a form of addition-elimination.



References





  1. ^ Morrison, R. T.; Boyd, R. N. (1983). Organic Chemistry (4th ed.). Boston: Allyn and Bacon. ISBN 0-205-05838-8..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ March, Jerry (1985), Advanced Organic Chemistry: Reactions, Mechanisms, and Structure (3rd ed.), New York: Wiley, ISBN 0-471-85472-7.


  3. ^ Reaction-Map of Organic Chemistry Murov, Steven. J. Chem. Educ. 2007, 84, 1224 Abstract




External links















-

Popular posts from this blog

Shashamane

Image
city in Oromia, Ethiopia Shashamane ሻሸመኔ (in Amharic) , Shashemane (in Oromo) Shashe city Main Street Shashamane Shashamane Location within Ethiopia Coordinates: 7°12′N 38°36′E  /  7.200°N 38.600°E  / 7.200; 38.600 Country Ethiopia Region Oromia Zone Mirab Arsi Population (2012)  • Total 122,046 Time zone UTC+3 (EAT) Climate Cwb Shashamane (or Shashemene , Oromo) is a town and a separate woreda in West Arsi Zone, Oromia Region, Ethiopia. The town lies on the Trans-African Highway 4 Cairo-Cape Town, about 150 miles (240 km) from the capital of Addis Ababa. It has a latitude of 7° 12' north and a longitude of 38° 36' east. The 2007 national census reported a total population for this town of 100,454, of whom 50,654 were men and 49,800 were women. A plurality of the inhabitants practiced Ethiopian Orthodox Christianity, with 43.44% of the population reporting they observed this belief, while 31.15% of the population said
Read more

Carrot

Image
Root vegetable, usually orange in color This article is about the cultivated vegetable. For other uses, see Carrot (disambiguation). Carrot Scientific classification Kingdom: Plantae Clade : Angiosperms Clade : Eudicots Clade : Asterids Order: Apiales Family: Apiaceae Genus: Daucus Species: D. carota Subspecies: D. c. subsp. sativus Trinomial name Daucus carota subsp. sativus (Hoffm.) Schübl. & G. Martens The carrot ( Daucus carota subsp. sativus ) is a root vegetable, usually orange in colour, though purple, black, red, white, and yellow cultivars exist. [1] Carrots are a domesticated form of the wild carrot, Daucus carota , native to Europe and southwestern Asia. The plant probably originated in Persia and was originally cultivated for its leaves and seeds. The most commonly eaten part of the plant is the taproot, although the stems and leaves are eaten as well. The domestic carrot ha
Read more

Deprivation index

Image
Deprivation indices are a measure of the level of deprivation in an area. Examples include: Indices of deprivation 2004 (ID2004) Indices of deprivation 2007 (ID2007) Underprivileged area score Carstairs index Department of Environment Index v t e Indices of Deprivation National (general deprivation) Carstairs index Index of Multiple Deprivation 2000 (IMD2000) Indices of deprivation 2004 (ID2004) Indices of deprivation 2007 (ID2007) Indices of deprivation 2010 (ID2010) National (subject specific deprivation) Underprivileged area score Department of Environment Index This economics-related article is a stub. You can help Wikipedia by expanding it. v t e This sociology-related article is a stub. You can help Wikipedia by expanding it. v t e This page is only for reference, If you need detailed information, please check here
Read more