Multiple Halogenations The a-halo ketone produced is more reactive than ketone. Enolate ion stabilized by e-withdrawing halogen. OH R-CH-CH3 I2 R-C-CH 2HI excess 12 OH 0H,H20 Copyright 2005 Pearson Prentice Hall,Inc.Multiple Halogenations ◼The -halo ketone produced is more reactive than ketone. ◼Enolate ion stabilized by e--withdrawing halogen. O H Cl Cl 2 OH , H2O _ O Cl Cl O Cl C Cl l O Cl C Cl l Cl