A redox reaction employed in an electrochemical cell has a

Saturday, October 15, 2016 Organic Chemistry Subject - Free Radical Halogenation homolytic cleavage- breakage of covalent bond to produce to new radical • compounds where each product gets one of the shared electrons • we use halogens (Br and Cl) • Mechanism (initiation, propagation, termination) - initiation- breaking the weakest bond to form two radical atoms using heat or light (hv) - propagation- using one of the radical atoms formed in step one and an alkane to form an alkyl radical • the alkyl radical will than react with another Cl-Cl (or Br-Br) bond to form another Cl radical - propagation chain reaction- the Cl radical can than react with another alkane and so on and so forth - termination- reacting two radicals together to get covalent bonds and destroy all radicals • can react a halogen (Cl or Br) radical and alkyl radical • can react a halogen radical with another halogen radical • can react two methyl radicals together - when breaking a bond with more than two carbons, the + charge should always be placed on the more stable position 1 Saturday, October 15, 2016 - tertiary positions of an alkyl radical are more stable than secondary positions which are more stable than primary positions due to the inductive effect • treat radical carbons as sp2 - Hyperconjugation- donation through space of parallel bonds - B