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Topic: How to store room temp unstable compounds ??  (Read 2696 times)

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Offline Lynda92

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How to store room temp unstable compounds ??
« on: December 16, 2014, 12:21:45 PM »
Does anyone have any suggestions of how to store room temp unstable compounds? Freezer sounds like the best option but should I keep my compounds in a solution? One of my compound is a white solid the other is an oil. They are E/Z stillbenes if anyone is interested

Offline Arkcon

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Re: How to store room temp unstable compounds ??
« Reply #1 on: December 16, 2014, 01:33:20 PM »
Generally, dilute solutions of reagents are even less stable in solution.  Ultimately, you'll have to check yourself by keeping them in the fridge, and also preparing them fresh, then compare them both in your application, to determine how long they're still usable.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline Corribus

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Re: How to store room temp unstable compounds ??
« Reply #2 on: December 16, 2014, 01:55:28 PM »
It depends on what the source of instability is. Deep freezer is the go-to solution, but storing under inert atmosphere or in the dark can also help, if oxidative or photochemistry (or both) is responsible for the decomposition.
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

Offline Mellitic

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Re: How to store room temp unstable compounds ??
« Reply #3 on: December 16, 2014, 03:12:57 PM »
I've had success with freezing compounds in anhydrous benzene.

Offline TheUnassuming

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Re: How to store room temp unstable compounds ??
« Reply #4 on: December 17, 2014, 03:09:59 PM »
I would store frozen in benzene.  It will extend the life of the compound over just storing neat in the freezer, whether or not its actually soluble in benzene.  If radical reactions are a problem you can add a touch of inhibitor (as long as it doesn't interfere with your next reaction)
When in doubt, avoid the Stille coupling.

Offline Lynda92

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Re: How to store room temp unstable compounds ??
« Reply #5 on: December 17, 2014, 03:59:41 PM »
Thanks very much everyone for your suggestions

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