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Bandil, the Hive; posted by woden
Practice (in theory of course)
5 grammes of norephedrine.HCl(26,5 mmoles), was placed in a 100 mL FBF, and 2,3 grammes of KOCN(28,4 mmoles) and 25 mL's of distilled water was
immediately added in succession. This was heated to reflux directly on the hotplate for two hours.
After this time, 30 mL's of 2M HCl(60 mmoles) was added. This caused a bit of bubbling(probably from the excess cyanate being broken down to gasseus
-i-cant-remember-what-). Reflux was continued for an additional two hours. The mixture took on an ever so slight pinkish tint, which the "old" synth
also tend to do at this stage.
After 2½ hours of reflux, the mixture was cooled and basified with sodium carbonate and presto a lot of pretty white crystals precipitated on the
bottom of the beaker. The yeild looked like that which is expected from the normal reaction. They will be measured shortly.
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