11. In contrast, a coordinatively saturated complex resists undergoing substitution and oxidative addition reactions . 12. The Michael-aldol sequence involves a Michael addition reaction and an aldol condensation. 13. There are two main types of polar addition reactions : electrophilic addition and nucleophilic addition. 14. Additionally, GaBr 3 can be used as a catalyst in certain oxidative addition reactions . 15. Two non-polar addition reactions exist as well, called free radical addition and cycloadditions. 16. Electrophilic attack to an aromatic system results in electrophilic aromatic substitution rather than an addition reaction . 17. It is a syn addition reaction . 18. Structure of the ligand and the proposed transition state for the key addition reaction are shown. 19. These reactions are also called Kharasch addition reactions ( or sometimes Curran-Kharasch reactions ). 20. The major product of the addition reaction will be the one formed from the more stable intermediate.
