Ch ical chemistr Reaction Kinetic Rice-Herzfeld mechanisms CH3CHO- Ma oCH3+oCHO r=kalch3chol ChaCHO CHa ks ,CHa+CHaCO. r=kblCH3] CH3COdk foCH+co r=kCH3CO。] QCH3+CH3M、CH3C3 r=ka[CH312 The net rates of the formation of the two intermediates are docH ka[CH3CHO]-k6ICH3EHOCH3]+k[](o CH31=0 d[CH3 CO. kCH3eHOH3-kCO。=0 dt The sum of the two equation is kalch3 cho]-kaloCH3]-=04 Physical Chemistry Rice-Herzfeld Mechanisms The net rates of the formation of the two intermediates are [ ] [ ][ ] [ ] [ ] 0 [ ] 2 3 3 3 3 3 3 = − • + • − • = • k CH CHO k CH CHO CH k CH CO k CH dt d CH a b c d [ ][ ] [ ] 0 [ ] 3 3 3 3 = • − • = • k CH CHO CH k CH CO dt d CH CO b c [ ] [ ] 0 2 ka CH3 CHO − kd •CH3 = CH CHO a CH CHO k ⎯⎯→• +• 3 3 [ ] r = ka CH3 CHO CH CHO +•CH ⎯⎯→CH +CH CO• b k 3 3 4 3 [ ][ ] CH3 CHO CH3 r kb = • CH CO c CH CO k 3 • ⎯⎯→• 3 + [ ] 3 r = k CH CO• c CH3 CH3 CH3 CH3 d k • +• ⎯⎯→ 2 3 r k [ CH ] d = • The sum of the two equation is Reaction Kinetics