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here is a photo of the crystals at that link.
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here is a photo of the crystals at that link.
and this is another method. dissolve 4-mmc in vodka 1g per 2.5ml. and forget about the solution for 4-5 weeks at room temperature. vodka evaporates, crystals remain in the container
minus temperature is not a prerequisite. you can do the same at a temperature of + 20C. but the higher the temperature in the room, the more 4-mmc will remain in the mother liquor. at -8C almost all 4-mmc will fall out of solution. at + 20C about 70% will fall out, about 30% will remain in the water. but what prevents you from driving off the water and getting the remains of 4-mmc, and then repeating the crystallization process again?
@G.Pattong As promised, I crystallized the way discussed here and here is the result.
I've washed the product again and i'm going to repeat the crystallization process.
Hello everyone!
How can I crystallize a ready-made aqueous solution of mef using NaCl if I didn't have flour initially? Let's say, i have a base of mef in dichloromethane and I'm going to acidify it in excess of water 135 ml per 100 mef, while dissolving mef in water - I do not put mef in flour, but immediately in water
At what stage to add NaCl and in what proportions. According to the upper experience, the author indicates 23 grams per 100 grams of mef, but he has 100 grams of mef dissolved in 100 ml of water. And my oxidation occurs at a figure of 135 ml per 100 g of the product.
How long do crystals form in the NaCl salt solution method? What size fractions are obtained? how long should the product be kept in the freezer? Does the exposure time affect the size of the crystal?
Thank you all!
on dcm you can't do it like that, you need to use water in the acidification process and then use, for example, ipa to immediately start the process of crystallization. Naci is not needed at all, it's nonsense. and you can not freeze because the crystal will not come out in the form of glass and crystal powder only
Thanks for the reply. I use acetone or ethanol. What are the freezing conditions to get large crystals with a 1 to 1 yield? Let's say I got an aqueous layer of mephedrone, diluted it with acetone or alcohol - how then is it better to freeze? If you immediately immerse -18 in the freezer, you will get a fine crystalline powder. How then to get large crystals quickly? Now I get large pure crystals only when this solution evaporates, but this is a long process
What kind of crystals do you want to get? you can use the form of needles but do not use a freezer and it lasts 24 hours, but still some of the solution must be evaporated to recover the rest of the product.
Hi bro. Now I get such crystals only by evaporation. But I am not satisfied with the timing if the layer is large. You say you can evaporate 50% and then into the freezer - will the crystal that will fall out from the remainder of the solution be strong or will it just be a small fraction, whereas large crystals already exist after evaporation.
Is there a way to grow crystals of stones if 1 kilo of mef is dissolved in water 1300 \ acetone 200. There is no equipment to evaporate - how to freeze properly right away and will it be convenient?
the biggest mistake is the wrong proportions then and you have to wait for weeks - water evaporates longer and acetone faster
I can't acidify with less water, when oxidized, less water simply won't take all the mef from dichloromethane. Do you have a solution for oxidation to an aqueous layer with different proportions?
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