Thermodynamic Products CH2 H-C1 800C CH
Thermodynamic Products H-Cl 80oC CH2 H Cl CH2 H Cl
Addition to 1,3,5-Hexatriene Br HBr 1,2 addition Br 1,4-addition not formed H Br 1,6-addition
Addition to 1,3,5-Hexatriene HBr Br H Br H 1,2 addition 1,6-addition Br H 1,4-addition 1 2 3 4 5 6 not formed
At 0C 1.2-addition is favored H H HH Br H H Br H+HBr H H H H H H H H H H H 1,3-Butadiene 3-Bromo-1-butene 1-Bromo-2-butene (a conjugated diene) (71%;1,2 addition) (29%;1,4 addition) e2004 Thomson-Brooks/Cole
At 0oC 1,2-addition is favored
H H H CHa ←→ H CH3 H H H H Br- H H O- CH Br H H H Br 1,4 addition 1,2 addition (29%) (71%) 2004 Thomson/Brooks Cole
At 40C,1,4-addition is preferred Br H2C=CHCH=CH2+HBr→ H2C=CHCHCHs CHsCH=CHCH2Br 1,2 adduct 1,4 adduct At 0C: 71% 29% At40°C: 15% 85% C2004 Thomson-Brooks/Cole
At 40oC, 1,4-addition is preferred