ORGANIC CHEMISTRY Chapter 7 7.6A E2 reactions. The Orientation of the Double bond in the product. Zaitsey's rule CHO Na CH3 CHCH3 CH5OH55°C CH2-CHCH3 Br (79 CH 3 CHO Na CH CH2CCH CH2-CCH C2HOH,55°C Br (1009%) CH3)3COK CH3(CH2)15 CH2 CH2-Br CH3(CH215 CH2-CH2 (CH3)3 COH 40°C (85%) Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 7 7.6A E2 reactions: The Orientation of the Double Bond in the Product. Zaitsev’s Rule C2H5O Na CH3CHCH3 Br C2H5OH 55°C CH2 CHCH3 (79%) C2H5O Na CH3CCH3 Br C2H5OH, CH3 55°C (100%) CH2 CCH3 CH3 CH3(CH2)15CH2CH2 Br (CH3)3COK 40°C CH3(CH2)15CH2 CH2 (85%) (CH3)3COH