Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: qualitative test for epoxides
jwarr
Hazard to Self
**




Posts: 85
Registered: 25-6-2009
Member Is Offline

Mood: No Mood

[*] posted on 21-3-2011 at 21:13
qualitative test for epoxides


Are there any relatively simple qualitative tests for epoxides? I looked into using periodic acid, but it seems silver nitrate (expensive) and nitric acid (not on hand) are required. Any alternatives would be much appreciated.

For anyone who is interested, the procedure outlined by http://pubs.acs.org/doi/pdf/10.1021/ac60069a047
is as follows:
Quote:


The procedure is a modification of the qualitative glycol test of
Shriner and Fuson (2). Exactly 2 drops of roncentrated nitric
acid is added to 2 ml. of a 0.5% solution of periodic acid, and 1 or
2 drops of the unknown is added. Water-insoluble unknowns
should first be dissolved in 2 ml. of dioxane or acetic acid, The
mixture is shaken and 1 or 2 drops of 5% silver nitrate is added at
room temperature. A positive test is the appearance of a white
precipitate of silver iodate which usually forms immediately, but
may require up to 5 minutes for complete precipitation. In all
cases a blank should be run for comparison. The test is nega-
tive for simple aldchydes, ket,ones, and alcohols
View user's profile View All Posts By User
DJF90
International Hazard
*****




Posts: 2266
Registered: 15-12-2007
Location: At the bench
Member Is Offline

Mood: No Mood

[*] posted on 22-3-2011 at 07:02


This paper might help...

Attachment: Spray reagent for epoxides.pdf (358kB)
This file has been downloaded 838 times

View user's profile View All Posts By User
jwarr
Hazard to Self
**




Posts: 85
Registered: 25-6-2009
Member Is Offline

Mood: No Mood

[*] posted on 23-3-2011 at 08:55


Fantastic! Just what I was looking for, thanks.
View user's profile View All Posts By User

  Go To Top