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2013-03-21T00:45:17Z

Bot: Migrating 1 interwiki links, now provided by Wikidata on d:Q7834016

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	~~Greetings. Allow me start by telling you the writer~~'s ~~title - Phebe~~. ~~California is our birth location~~. [~~http:~~//~~raybana~~.~~com~~/~~chat~~/pg/~~groups~~/~~174883/solid-advice-for~~-~~dealing~~-~~with~~-~~a-candida~~/ ~~over~~ the ~~counter std test] favorite pastime for my children~~ and me is to ~~perform baseball but I haven't made a dime with it~~. ~~He used to be unemployed but now he is a meter reader~~.		The '''Schlenk equilibrium,''' named after its discoverer [[Wilhelm Schlenk]], is a [[chemical equilibrium]] taking place in solutions of [[Grignard reagent]]s.<ref>{{cite journal \| author = W. Schlenk; W. Schlenk, Jr. \| journal = [[Chem. Ber.]] \| volume = 62 \| issue = 4 \| pages = 920 \| year = 1929 \| doi =10.1002/cber.19290620422 \| title = Über die Konstitution der Grignardschen Magnesiumverbindungen}}</ref><ref>''Grignard Reagents: New Developments'' H. G. Richey (Editor) ISBN 0-471-99908-3</ref>

			:2 RMgX <math>\overrightarrow{\leftarrow}</math> MgX<sub>2</sub> + MgR<sub>2</sub>

			The process described is an equilibrium between two equivalents of an alkyl or aryl magnesium halide on the left of the equation and on the right side, one equivalent of the di[[alkyl]] or di[[aryl]] magnesium compound and magnesium halide [[salt]]. Organomagnesium halides in solution also form [[Dimer (chemistry)\|dimers]] and higher [[oligomer]]s, especially at high concentration. Alkyl magnesium chlorides in ether are present as dimers.<ref>J. March Advanced Organic Chemistry 3rd Ed. ISBN 0-471-85472-7</ref>

			The position of the equilibrium is influenced by solvent, temperature, and the nature of the various substituents. It is known that magnesium center in Grignard reagents typically coordinates two molecules of ether such as diethyl ether or [[tetrahydrofuran]] (THF). Thus they are more precisely described as having the formula RMgXL<sub>2</sub> where L = an ether. In the presence of monoethers, the equilibrium typically favors the alkyl- or arylmagnesium halide. Addition of [[dioxane]] to such solutions, however, leads to selective precipitation of dihalide MgX<sub>2</sub>(dioxane), driving the equilibrium completely to the right side of the equation.<ref>{{cite journal \| author = Richard A. Andersen, Geoffrey Wilkinson \| title = Bis[(Trimethylsilyl)Methyl] Magnesium \| journal = [[Inorg. Synth.]] \| doi = 10.1002/9780470132500.ch61 \| year = 1979 \| volume = 19 \| pages = 262}}</ref> The dialkylmagnesium compounds are potent alkylating agents and are popular in the synthesis of organometallic compounds.

			==References==
			{{reflist}}

			[[Category:Organometallic chemistry]]
			[[Category:Organic chemistry]]

174.53.163.119 at 16:30, 7 June 2012

2012-06-07T16:30:37Z

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Greetings. Allow me start by telling you the writer's title - Phebe. California is our birth location. [http://raybana.com/chat/pg/groups/174883/solid-advice-for-dealing-with-a-candida/ over the counter std test] favorite pastime for my children and me is to perform baseball but I haven't made a dime with it. He used to be unemployed but now he is a meter reader.

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en>KLBot2: Bot: Migrating 1 interwiki links, now provided by Wikidata on :d:Q7834016

174.53.163.119 at 16:30, 7 June 2012