Much of the chloroform of commerce is obtained by the action of iron upon carbon tetra chloride: the following preparationis however instructive.
Fit a 2 litre round-bottomed flask with a two-holed cork carrying a dropping funnel and a glass tube bent at anangle of about 600 to act as a still head . Attach the letter to a condensor (set for own ward distilation) and insert the end of the condensor through a cork into filler flask to act as a receiver. Attach a lenght of 5mm glass tubing to steam of the funnel by means of a short rubber “pressure”tubinng ;the end of the glass tube should dip just below the surface the liquid in the flask
REACTION
3Ca(Ocl)2 +6 H2O = 6HClO +3 Ca(OH)2
6 HClO = 6HCl +6On
12HCl + 6On = 6H2O+6Cl2
2CH3COCH3 +6Cl2 = 2CCl3COCH3 +6HCl
2CCl3COCH3 +2H2O = 2CHCL3 +2CH3COOH
2CH3COOH +Ca(OH)2 = (CH3COO)2Ca + 2H2O
RESULT REACTION
3Ca(OCL)2 +CH3COCH3 = 2CHCl3 +2Ca(OH)2+(CH3COO)2Ca
FROM : CHEMISTRY ORGANIC BOOK
Laboratory Guide
