Quiz | Delocalized π Systems
Which of the following molecules has a conjugated π system?
1-vinylcyclohex-1-ene
cyclohexa-1,4-diene
penta-1,4-diene
3-methoxyprop-1-ene
What dienophile should be used to synthesize the trans-4,5-dimethylcyclohex-1-ene?
(E)-but-2-ene
(Z)-but-2-ene
2-methyl-prop-1-ene
1,3-butandiene
What is the best synthetic condition to perform a radical halogenation of an allylic group?
Br2 in acid condition
Br2 in basic condition
NBS, CCl4, hν
Br2, ROOR
What is the best condition to promote the kinetic product?
low temperature + short time
low temperature + long time
high temperature + short time
high temperature + long time
What is the thermodynamic product for the hydrobromination of 1,3-butandiene?
1-bromobut-2-ene
3-bromobut-1-ene
1,4-dibromobut-2-ene
3,4-dibromobut-1-ene
Which statement is true concerning the Diels-Alder reactions?
It is a [4+2] cycloaddition
It is accelerated when the diene is electron-rich
It is stereospecific: the endo product is favored
All of the above
