P pistolpete007 Full Member 10+ Year Member 15+ Year Member Joined May 18, 2008 Messages 318 Reaction score 0 Jun 15, 2008 #1 can some clearly explain when to do which and give examples of each please? Members don't see this ad.
can some clearly explain when to do which and give examples of each please? Members don't see this ad.
I informatique Full Member 10+ Year Member 15+ Year Member Joined Mar 24, 2008 Messages 190 Reaction score 0 Jun 16, 2008 #2 At -40 degrees C = 1, 2-addition across a conjugated diene (kinetic control) At higher temperatures = 1,4-addition (thermodynamic control) ==--== 1 2 3 4 (sorry for the crappy picture, but let's say that's a double bond, single, and then a double. If I had H-Cl in -40 degrees C, the H would be added to carbon 1 leaving a carbocation at carbon 2. Cl adds on to carbon 2. Upvote 0 Downvote
At -40 degrees C = 1, 2-addition across a conjugated diene (kinetic control) At higher temperatures = 1,4-addition (thermodynamic control) ==--== 1 2 3 4 (sorry for the crappy picture, but let's say that's a double bond, single, and then a double. If I had H-Cl in -40 degrees C, the H would be added to carbon 1 leaving a carbocation at carbon 2. Cl adds on to carbon 2.
