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Solubility in hot ether, DCM

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chiral

Rising Star
Someone's been curious about the solubility of DMT freebase in pet. ether at 50C. What is the relationship between temp and solubility... it's understood it rises exponentially. (2^d ? ) Does this mean that something like .9g/100ml (naptha, it is thought) @ 20C becomes 3.6g/ml at 40C?

The ether fractions are 60C-75C, but it is also understood that, being in a mixture, things change. It could be assumed that, due to the ether's lower bp, things would solute well.

If what I have said is true, then it could be supposed that using near boiling ether would allow a much smaller volume to be used for freeze precip. This could be very effective. Would this also require less time in the freezer.

There is curiosity about the following as well. What is the solubility of DMT in room temp DCM? (I've seen it somewhere, but cannot find it).

It has been thought to put a string in the mix, like rock candy ;-)
 
Well, I'm sure some solubility scales show exponential growth, however 40C is NOT twice as hot at 20C!!!! Celcius is a convenient temperature scale based around temperatures encountered in day-to-day experience (freezing and boiling of water). Absolute temperature is measured in Kelvins, 20C is 293K, 40C is 313K, so 40C = 1.14(20C) in terms of kinetic energy (it's only 14% more soluble).

Also, in realistic terms, solubility doesn't follow simple quadratic curves, though they can be useful as a "first guess" when it comes to establishing real data.
 
Some molecules, like calcium hydroxide, actually become LESS soluble as temperature rises. But this is not the norm.
 
chiral said:
I see. What is the naptha bp fraction for the .9g/100ml figure?
Click to expand...
Sorry I got no answers to your questions but I am curious as to why you bother knowing that stuff (other than just general knowledge for the sake of it). It is difficult to find reliable information on the web. What would be the practical implications?

People have been extracting and recrystallising spice with all sorts of solvents without caring too much about the absolute solubility values of spice in solvents. Usually empirical descripition like "very soluble" "moderately soluble" and "not soluble" have sufficed.
 
Well, if 5g DMT freebase as an HCl salt won't fit in 500ml of water + other stuff + solids, that makes a difference. How far can you cook it down? If it's, hypothetically, 50mg/ml, it can be accepted that 2-3ml/50mg would be groovy.
 
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