96 MECHANISMS 83. Here is an example of an E2 reaction forming a double bond in a ring CHI3 H CH - CH H 1 H H-O H-Cl 84. The Hofmann elimination is a similar reaction except that the charge distribution is different. The hydroxyl oxygen which had a negative charge becomes and the nitrogen which had a positive charge becomes CH3 CH3-N-CH 1 CH-CH-CH - CH 10-H supply arrows supply anrows