Search results

im not kinda experienced in such amounts, but i believe that efficent replacement of ice water would help, you should test

you can do some cooling with ice bath, dont you have that while we speak about such amounts? youc an repalce solvent as well, toluen not efficent and for sure more than 30l will be needed 40-50

btw is this numeric sequence of tings you wanna do? dear, you must wash it before you wanna add hcl edit: oh sorry i red it badly, nevermind

why choice toulen? dont you prefer some other more effective solvent?

as well please tell us what exactly you do to "crystalize" it, i think we can improve that as well

if you have not good quality acetone - you should distill it 1st, but if you have access to buy clean or better - possess it and use it

remember to make them almost solid to make good purufication, if you dont do that you will waste a lot of acetone,1-3 rinses will dp its job but if you wont push them into surface it will take a lot

wash in minus celcius temp acetone i believe you did somem isatkes when crystalizing, like you crystalized that including impurities. if liquid with mmc was dark colors you should removethem before all of the luqid crystalized - I believe.

its problem with 2b4m itself here, it didnt even react, perhaps in EA it would

Hmm I didnt watch the video. I think its good time to ask an expert Perhaps @G.Patton would like to help. I would like to know as well :)

Its both the same. Water is added to rinse it. In both cases water was used

I cant tell you that

Try to repeat and see what result will be, then we can take a look. I guess. 2b4m

There is 1st problem to fix with 4bk synthesis for sure, becasue its reason it didnt react in futher 4mmc synthesis. Based on photo I think you could have some problems on filtering that via cloth, or using buchner funnel. If you use buchner funnel be sure thats capacity is good for amount of...

its 55-60 celcius max. Temperature goes high if very large amount of methylamine is added and there is not a lot of solvent, usually its not a problem unless there is DCM synthesis becasue it has to be kept below 36-38. You should have cold water prepared to cool down if you will have...

are you sure that you followed the time frames for requried steps? like beeing careful to not add peroxide before before bromide is stirred well enough. Temperature wasnt too high? did you check what ph you had after using sodium bicarbonate?

You can get 2b4m by adding Br2 to 4MP in a solvent that you will use later for 4mmc synthesis

You had to do some mistakes, just try again and read carefully posts that expert shared, you will find the problem for sure

1st of all you should just do 2b4m from 4 MP just by leaving that in a solvent for a 4mmc synthesis. I mean it would be easier. If you wanna do this way you did, you should crystalize it in some solvent to get rid of impurities. You need clean bk4 probably it was very impure and didnt want to...

I am really sorry but I just cant agree what your saying. Why acetone is that? it depends what solvents your using and whats your synthesis procedure. Its not acetone that is a problem but a technique. Sometimes when I did some mistakes during syntesis, I had these colors, but its just about...