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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Sep 2008 23:39:24 IST
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why only dry ether is used in grignard reaction
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20 Sep 2008 23:45:43 IST
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once pls refer dis
http://en.wikipedia.org/wiki/Grignard_reaction
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@Bh! FOR ME { life = MU$IC }
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21 Sep 2008 00:15:40 IST
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my friend there is no such answer abt why only dry ether is used any no water or pehnols etc.............................
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21 Sep 2008 06:03:42 IST
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RX+Mg===RMgX
in presence of water mg reacts with water forming MgOH.Hence ether is used
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2 Oct 2008 23:11:45 IST
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i don't think the ans are right.ether is used to for dative bond with Mg so as to satisfy coordination valency of Mg. It also acts as the solvent and increases the nucleophilicity of the gridnard reagent By Solvolysis.rate if useful.
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2 Oct 2008 23:21:19 IST
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Since Grignard reagent is highly highly reactive ,ether a highly higly unreactive compound is used to control reactivity of Grignard reagent. Dry ether is used so that Grignard reagent does not react with water.............
Hope u have understood..............
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3 Oct 2008 00:22:00 IST
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d reason being ...that if we use aq one then CH3(-) will rxt wid d h(+) of water 2 form alkane and will nt get d desired product !
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3 Oct 2008 12:22:55 IST
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Ether is used not only to provide a medium for the fnction of grignard reagent, but it also makes them dissolve (in ether through solvolysis)...c the Diagram...
so the basic function of ether is to solvate the Grignard...
so that it gains stability...
one more probability is that... the diagram shown below...
another molecule of RMgX comes and attacks on the lone pair of X to get solvated... hence these two resonating structures can be drawn, which account for the stability of RMgX in dry ether..
hope its clear now.. :)
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