nelsonB
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Dimethylzinc
Hi
i have looked about the reaction of methyl iodide with zinc
to produce Dimethylzinc
since methyl iodide and Dimethylzinc have both a boiling point pretty close i was wondering if methyl iodide could be remplaced by methyl chloride in
a pressure vessel that is headed with both product inside zinc and methyl chloride
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Nicodem
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Thread Moved
26-9-2013 at 06:43 |
DraconicAcid
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Iodoalkanes, in my experience, tend to be a lot more reactive towards metals than chloroalkanes. When people make Grignard reagents, they usually use
the bromoalkanes as a compromise between the higher reactivity of the heavier halides and the lower cost of the chlorides.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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BromicAcid
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Sigh....
Methylchloride. do you have experience with Grignard reagents? Are you familiar with how difficult it can be to get an alkyl chloride to form a
Grignard? That reactivity trend should at least be a guideline here, not to mention wanting to work with methyl chloride under pressure in a reaction
that generates plenty of heat.
Not just that, are you aware of just how viciously pyrophoric this material is? There is plenty of literature out there, some of it better than a
century old on just this procedure, it was after all the father procedure of organometallic chemistry. There is an Org Syn prep, an oldie but a
goodie that has some of the information that you are looking for. It is not just a matter of mixing these reagents, it can go well... apeshit.
http://orgsyn.org/orgsyn/prep.asp?prep=cv2p0184
Having worked with and prepared diethyl and it's little brother I can attest to the insanity of these compounds. Even in a properly outfitted lab
with years of experience on your side, these little buggers will still lay in wait for that split second chance where they can take your life.
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AndersHoveland
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True, but in this case the ZnCl2 that forms may be able to act as a catalyst. Bromoalkanes are also very reactive.
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sonogashira
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Quote: Originally posted by nelsonB  | Hi
i have looked about the reaction of methyl iodide with zinc
to produce Dimethylzinc
since methyl iodide and Dimethylzinc have both a boiling point pretty close i was wondering if methyl iodide could be remplaced by methyl chloride in
a pressure vessel that is headed with both product inside zinc and methyl chloride |
Please make a video when
you open the pressure vessel. 
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