I have a 25 cc balloon which contains 10-12 cc pyrrole...(my whole material is 25 cc and we are limited for purchasing the material) I use a Platinum pump (JB) and the temperature is arround 70-80 C degrees ... it is in an oil bath and the places out of the bath are isolated except the condensor and the drop gathering ballon...but i can not evaporate it..please advise on the operative condition... I have sealed all the leaks
Dear Farzane
I'm NOT sure but it seems your bath temperature is low to vaporize pyrrole. I know that normal boiling point of pyrrole is around 130 C but you are at 70 ~ 80 C.
There are two senario two solve this problem:
1) Rising temperature up to 130 C in ambient pressure or:
2) Adding water or more volatile immissible compound to reduce vapor pressure of pyrrole
Another manner is using vacuum pump. However you must increase the volatility of the solution
Good Luck
The vacuum pump will be necessary. I usually use the rotavap, 30mbar at 55-60° water bath. Works nicely, don't need to use N2 atmosphere. Then store it as cold as you can, it is stable for months at -23°C.
what ll be the confirmatory test to show that pyrrole is actually in distilled form after distillation? or what ll indicate this, other than change in color?
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