Chapter 16: PROBLEM 16.20 (page 623)
Question: Rank the following dienes in order of increasing reactivity in a Diels–Alder reaction.
a.
b.
c.
Short Answer
Answer
Order of reactivity of dienes:
Chapter 16: PROBLEM 16.20 (page 623)
Question: Rank the following dienes in order of increasing reactivity in a Diels–Alder reaction.
a.
b.
c.
Answer
Order of reactivity of dienes:
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Get started for freeQuestion: Intramolecular Diels–Alder reactions are possible when a substrate contains both a 1,3-diene and a dienophile, as shown in the following general reaction.
With this in mind, draw the product of each intramolecular Diels–Alder reaction.
a.
b.
Question: Which of the following systems are conjugated?
a.
b.
c.
d.
e.
f.
Question: Draw all possible stereoisomers of hepta-2,4-diene and label each double bond as E or Z.
Question: Draw all reasonable resonance structures for each species.
a.
b.
c.
d.
e.
f.
Question: Addition of HBr to alleneforms 2-bromoprop-1-ene rather than 3-bromoprop-1-ene, even though 3-bromoprop-1-ene is formed from an allylic carbocation. Considering the arrangement of orbitals in the allene reactant, explain this result.
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