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aga
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[*] posted on 5-5-2016 at 11:36


Pessimism may well be appropriate.

I stuck around 200ml in a stoppered FBF, then put it in the 'lab fridge' with a thermocouple taped to the flask.

12.4 C, no change.

Gently agitated the liquid a few times (kicked the fridge) and still nothing.

It's in the freezer at the moment, next to the mini veg spring rolls at about 2 C and still nothing.



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[*] posted on 5-5-2016 at 23:29


200ml of mixed xylenes in a domestic freezer (about -4 C) overnight does absolutely nothing.

The water clear liquid appears exactly the same as at room temperature.



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Volanschemia
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[*] posted on 5-5-2016 at 23:54


Quote: Originally posted by blogfast25  
Quote: Originally posted by aga  
discovered 1litre of Xylenes,


xylenes being the operative word:

https://en.wikipedia.org/wiki/Xylene

For Volans' synth you need ortho-xylene, NOT the mixture of three isomers usually sold.


I thought the point of aga's synthesis was to end up with multiple isomers?
Quote:
i need a relatively simple organic synthesis that generally ends up as a fairly predictable mixture of ortho/para/meta products to test the idea with.


And I did use mixed isomers in my synth, they were separated in converting to Phthalic Anhydride.

[Edited on 6-5-2016 by Volanschemia]



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[*] posted on 6-5-2016 at 00:13


Oh !

OK. I'll use this stuff as-is and see what happens.



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[*] posted on 6-5-2016 at 00:29


If you run the Double Benzylic Oxidation on the mixed isomers you will get roughly 20% o-Phthalic Acid, 70% m-Phthalic Acid, 9% p-Phthalic Acid and possibly 1% Benzoic Acid, depending on your source.

Those figures are based on the brand I can buy, so they may vary.



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