ORGANIC CHEMISTRY Chapter 3 Additions(加成) g Addition reactions occur when two reactants add together to form a single new product with no atoms“ left over? o In an addition all parts of the adding reagent appear in the product; two molecules become one A +B C Br Bi CHo=CHo Br-Br CH -CH, H Br CH2=CH2+H-Br—CH2-Cl Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 3 Additions (加成) Addition reactions occur when two reactants add together to form a single new product with no atoms “left over”. In an addition all parts of the adding reagent appear in the product;two molecules become one A + B C CH2 CH2 + Br Br CH2 CH2 Br Br CH2 CH2 + H Br CH2 CH2 H Br