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Dr.Muto
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[*] posted on 5-3-2006 at 06:41
iodobenzene


Help anyone.........In the conversion of aniline to iodobenzene can I substitute sodium nitrate for the sodium nitrite I do not have. If not can I readily convert sodium nitrate to the nitrite?
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Phel
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[*] posted on 5-3-2006 at 06:57


You'll want the nitrosonium ion (<sup>+</sup>N=O)in your diazotization, which won't be formed with NaNO3. For conversion of nitrate -> nitrite look here:
https://sciencemadness.org/talk/viewthread.php?tid=52 (preparation of ionic nitrites)

[Edited on 5-3-2006 by Phel]
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[*] posted on 5-3-2006 at 07:14


Reference Information:


aniline

Iodobenzene


I seems to me it's easier to make iodobenzene starting with benzene, otherwise you would have to find a way to convert and amine to the halogen you seek..... solo

http://www.chemguide.co.uk/organicprops/arylhalides/preparat...

[Edited on 5-3-2006 by solo]




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Dr.Muto
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[*] posted on 5-3-2006 at 08:36


Solo aniline is what I have to work with, actualy hcl variety. See att. reference material I have been looking at. And as I posted query nitrate vs ntrite since I have the one & not the other. Everyones discussion and pointers are much appreciated
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Dr.Muto
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[*] posted on 5-3-2006 at 08:37


ref i am looking at

Attachment: 7_Diazotisation_aniline.html (19kB)
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Dr.Muto
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[*] posted on 5-3-2006 at 08:39


also

Attachment: propsdiazo.html (12kB)
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Dr.Muto
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[*] posted on 5-3-2006 at 08:41


and

Attachment: preparation.html (7kB)
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Dr.Muto
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[*] posted on 5-3-2006 at 08:42


finally
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[*] posted on 5-3-2006 at 08:44


and finally

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[*] posted on 5-3-2006 at 08:55


I have done the production of iodobenzene from aniline myself, and it worked nicely. You do need sodium nitrite though.
Go to the pharmacy and ask for it if necessary, or reduce your sodium nitate with molten lead.

The crude iodobenzene is black, and must be washed with HCl, NaOH and then redistilled.
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[*] posted on 5-3-2006 at 09:38


Thak You
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