Author Topic: Testing your ketone + other resourse  (Read 1325 times)

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synthesys

  • Guest
Testing your ketone + other resourse
« on: March 23, 2003, 11:46:00 AM »
Sodium Bisulfite Addition Complex
                              H
 O                           |
 ||  +  NaHSO3  -->  ---OH
/  \                          |
                             SO3 - Na+
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Aldehyde and Ketone
 

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Procedure
Place 1 mL of sodium bisulfite reagent in a test tube and add 0.3 mL or 300 mg of unknown. Stopper the test tube and shake vigorously.

Sodium bisulfite reagent: Add 1 mL of ethanol to 4 mL of a 40% aqueous solution of sodium bisulfite. Decant or filter the solution prior to use.

Positive Test:
Formation of a precipitate is a positive test.

Complications:
Aryl methyl ketones form the precipitate slowly or not at all.

Addition complex stable only in neutral solution.
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There are some stingy bees on the Hive that will not share their resources, I will not name drop, you all know who you are. My message to you is FUCK YOU. Took me some time to find this, so I wanted to share this with other people trying to learn.

Here is another useful link, that will give you some options for testing your reagents:

http://www.chemistry.ccsu.edu/glagovich/teaching/472/qualanal/tests/tests.html


Rhodium

  • Guest
Bisulfite
« Reply #1 on: March 23, 2003, 11:51:00 AM »

Post 69041 (missing)

(Rhodium: "Re: What makes bisulfite work?", Chemistry Discourse)


https://www.thevespiary.org/rhodium/Rhodium/chemistry/eleusis/bisulfite.html