2. Iodoform( tri-iodornethane, CHl3) Iodoform is prepared by iodoform reaction.
Compounds containing either CH 3 CO- or CH 3 CH( OH) group form yellow colour iodoform with I 2 and NaOH.
Iodoform when comes in contact with organic matter, decomposes easily to free iodine, an antiseptic. Due to its objectionable smell, it has been replaced by other formulations containing iodine.
Polyhalogen Derivatives
1. Tetrachloromethane( Carbon Tetrachloride, CCl 4)
Preparation
CCI 4 is a colourless, non-inflammable, poisonous liquid, soluble in alcohol and ether.