Re: ORGLIST: How to separate methyl iodide

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From: patel vimalkumar mahendrabhai (vimalhet$##$rediffmail.com)
Date: Fri Sep 26 2008 - 00:00:46 EDT


   yeh, there is a possibility of methyl iodide quarternary salts with amines if this is the case treat it with dilute ammonia solution;you will be able to remove colouration problem caused by iodide. regrds, Vimal Patel Vadodara On Thu, 25 Sep 2008 Sandra Bartoli wrote : > >I agree. I really do not think what you see is Methyl Iodide. >It must be that a methyl residue is attached somewhere else in your molecule. >What ratio can you see from NMR? i mean, what ratio supposed CH3I/product can you estimate from NMR? What's the chemical shift? In which solvent? > > > >Sandra Bartoli> Date: Wed, 24 Sep 2008 13:55:30 -0700> From: cardman400$##$yahoo.com> To: everybody$##$orglist.net; himakp$##$siu.edu> Subject: Re: ORGLIST: How to separate methyl iodide> > It's also doubtful that you are seeing any methyl iodide by TLC, since it's not UV active and simple alkyl halides usually can't be visualized with iodine vapor. Even if it were present, it would probably evaporate off the plate along with your spotting solvent. > > > --- On Wed, 9/24/08, Hima Potturi <himakp$##$siu.edu> wrote:> > > From: Hima Potturi <himakp$##$siu.edu>> > Subject: Re: ORGLIST: How to separate methyl iodide> > To: everybody$##$orglist.net> > Date: Wednesday, September 24, 2008, 10:15 AM> > Methyl iodide has very low boiling point (around 42C).. You> > should be able to> > get rid of it on a rotovapor.> > > > Date: Tue, 23 Sep 2008 23:12:21 -0700 (PDT)> > From: Suraya Zulkepli <kinrara_16$##$yahoo.com>> > Subject: ORGLIST: How to separate methyl iodide from the> > main product> > (IODOLACTONIZATION)> > To: everybody$##$orglist.net> > Message-ID:> > <583068.44937.qm$##$web53912.mail.re2.yahoo.com>> > Content-Type: text/plain; charset="us-ascii"> > > > Can anyone tell me how to separate the compund of methyl> > iodide from the> > product of 6 membered ring lactone?Its because I got from> > Nmr result still> > have peak of CH3I..I also tried many ratio with HEX:EA but> > still cant> > separate coz its look like overlapp with the main product> > even I can look> > one spot with TLC under UV and Iodine.( means 2 compound in> > one spot).> > > > Hope anyone can help me so..> > > > Thanx in advance> > > > Suraya> > > > > > > > _______________________________________________> > ORGLIST - Organic Chemistry Mailing List> > Website / Archive / FAQ: http://www.orglist.net> > To post a message (TO EVERYBODY) send to> > everybody$##$orglist.net> > To unsubscribe, send to everybody-request$##$orglist.net the> > message: unsubscribe your_orglist_password your_address> > > > _______________________________________________> ORGLIST - Organic Chemistry Mailing List> Website / Archive / FAQ: http://www.orglist.net> To post a message (TO EVERYBODY) send to everybody$##$orglist.net> To unsubscribe, send to everybody-request$##$orglist.net the message: unsubscribe your_orglist_password your_address >_________________________________________________________________ >Stanco della solita finestra? Personalizza la tua Hotmail! >http://www.messenger.it/personalizza.html#sfondi >_______________________________________________ >ORGLIST - Organic Chemistry Mailing List >Website / Archive / FAQ: http://www.orglist.net >To post a message (TO EVERYBODY) send to everybody$##$orglist.net >To unsubscribe, send to everybody-request$##$orglist.net the message: unsubscribe your_orglist_password your_address Vimal Patel


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