Beryllium
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Iodomethane Synthesis
An idea for the synthesis and isolation of iodomethane came to me today. Please correct me on any mistakes and give your opinion/advice. 
Numbers aren't worked out, I'm looking for input as to the viability of the method as a whole.
NaI/KI + Phosphoric Acid in water. Add methanol until iodide is consumed.
As MeI is not especially soluble in water(14g/L@20C), the water and the MeI would separate as the methanol is consumed. The MeI could then be isolated
via separatory funnel.
Thoughts?
Edit- 'doh, not enough sleep!
[Edited on 6-1-2008 by Beryllium]
[Edited on 7-1-2008 by Beryllium]
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Maja
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Iodomethane is very very volatile bp 40C. Refluxing for some time H3PO4 + NaI + Methanol works well. Iodomethane also is very toxic.
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Beryllium
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| Quote: | Originally posted by Maja
Iodomethane is very very volatile bp 40C. Refluxing for some time H3PO4 + NaI + Methanol works well. Iodomethane also is very toxic.
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Any idea as to the duration of reflux or yield?
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Maja
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Try to search. I tried. https://sciencemadness.org/talk/viewthread.php?tid=7570&...
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Beryllium
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Ah, I searched, but not for methyl iodide. Thanks for the assistance.
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Klute
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Be carefull! This a very noxiuous compound! Work under an efficient fume hood, no bare skin, and even a suited gas mask would adviseable.
It's the kind of stuff you don't want to take a wiff of. I will kill you years after (cancer) if it doesn't immediatly. The ease in which it can be
made must not make you forget how dangerous it is.
Be safe.
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Tsjerk
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iodomethane
There will be no di-iodo-methane formed in this synthesis. Neither will methane. But it's advisable to use cooled water in your condensor if you
reflux.
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