alkene/diene reactions

Question 1

what is the diene reaction and what does it form?

Answer 1

reaction between dieneophlile (compound containing a double bond acting as a nucleophile) and a conjugated diene to produce a cyclohexene

Question 2

what makes a good dieneophile and diene?

Answer 2

good dienophile has a electron withdrawing group and a conjugated diene has a electron donating group

Question 3

can cis or the trans form of diene react? or both? why and why not?

Answer 3

Only CIS form of diene can react because the trans form is too far apart from each other see “notes on diene rxns”

Question 4

How can we get an cis alkene?

Answer 4

From alkyne using lindlars regent

Question 5

how can e get a trans alkene

Answer 5

From alkyne using sodium salt and ammonia

Question 6

what does alkene react with to give an epoxide?

Answer 6

peracid - HO-O-CO-R

Question 7

WHat does an alkene and peracid react to give?

Answer 7

An epoxide - loooks like a man with a crown with hanging man next to him who is then also next to a guard

Question 8

how are peracids formed?

Answer 8

peracids are formed by carb acid + hydrogen PERoxide

Question 9

what are the two rules when creating a alkene from an OH? THINK THE NEIGHBOURING CARBONS

Answer 9

when a secondary carbon is near a Quaternary carbon, a methyl shift will happen AND secondary carbon is near a titiary carbon, a hydrogen shift will happen