Hi at all BL'ers,
I've only recently joined this wonderful forum but during these years i've read and learned A LOT here.
My cat was wondering how to separate the dextro-rotatory isomer from a racemic amph sulphate mixture (50-50 I guess) of the two enantiomers.
My cat has read and read the erowid guide (here's the LINK) but he really can't understand some points (surely due to his bad english), so he was hoping to find some answers here.
What he understood of the guide is to react 1 mole of the basified racemic mixture with 1.2 mole of tartaric acid, dissolve the salt thus obtained with about 1 litre of pure ethanol, bring it to boiling point and then let cool to 60°C to effect crystallisation and filtered hot.
Guide says to repeat recrystallisation until a concentration of 8g per 100cc of acqueous solution is obtained. Well, what acqueous solution is it referring to? Doesn't it says to filter out the solid d-amphetamine bitartrate crystals? So what is this acqueous solution? Sorry but my cat really couldn't stand.
And.. now? How do he can obtain dextroamphetamine sulphate from d-amphetamine bitartrate thus obtained?
Sorry for the amount of questions for this relatively simple process, and if maybe something isn't clear due to my cat's bad english.
[I hope i posted in the correct section, otherwise moderators feel free to move it where they believe it would be better suited. Thanks!]
I've only recently joined this wonderful forum but during these years i've read and learned A LOT here.
My cat was wondering how to separate the dextro-rotatory isomer from a racemic amph sulphate mixture (50-50 I guess) of the two enantiomers.
My cat has read and read the erowid guide (here's the LINK) but he really can't understand some points (surely due to his bad english), so he was hoping to find some answers here.
What he understood of the guide is to react 1 mole of the basified racemic mixture with 1.2 mole of tartaric acid, dissolve the salt thus obtained with about 1 litre of pure ethanol, bring it to boiling point and then let cool to 60°C to effect crystallisation and filtered hot.
Guide says to repeat recrystallisation until a concentration of 8g per 100cc of acqueous solution is obtained. Well, what acqueous solution is it referring to? Doesn't it says to filter out the solid d-amphetamine bitartrate crystals? So what is this acqueous solution? Sorry but my cat really couldn't stand.
And.. now? How do he can obtain dextroamphetamine sulphate from d-amphetamine bitartrate thus obtained?
Sorry for the amount of questions for this relatively simple process, and if maybe something isn't clear due to my cat's bad english.
[I hope i posted in the correct section, otherwise moderators feel free to move it where they believe it would be better suited. Thanks!]
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