FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 30: Orbitals and Organic Chemistry: Pericyclic Reactions

Show Answer

Share

---

All types

Filters

Study Flashcards

Question 21

Essay

Review LaterAdd Note

Review Later

Predict the product (including stereochemistry) when the following substance reacts under thermal conditions.

Correct Answer

verified

Show Answer

Question 22

Multiple Choice

Review LaterAdd Note

Review Later

For an odd number of electron pairs (double bonds) ,for cycloadditions reactions which of the following rules is correct?:

A) thermal conditions - antarafacial,photochemical conditions - suprafacial
B) thermal conditions - suprafacial,photochemical conditions - antarafacial

C) A) and B)
D) undefined

Correct Answer

verified

Show Answer

Question 23

Essay

Review LaterAdd Note

Exhibit 30-6 Consider the reaction sequence below to answer the following question(s): -Refer to Exhibit 30-6.Explain the stereochemistry of product B.

There are three major classes of pericyclic reactions.Which of the following types of reactions is not an example of a pericyclic process?

How many π MO's does the following compound have?

Exhibit 30-9 Vitamin D₃,cholecalciferol,is synthesized under the skin by the photochemical pericyclic process shown below.Answer the following question(s) about these reactions. -Refer to Exhibit 30-9.The second step in this process is a(n) :

Exhibit 30-6 Consider the reaction sequence below to answer the following question(s): -Refer to Exhibit 30-6.Explain the stereochemistry of product C.

Exhibit 30-5 To answer the following question(s) ,consider the reaction below: -Refer to Exhibit 30-5.How many pairs of electrons are involved in this pericyclic reaction?

Exhibit 30-1 To answer the following question(s),consider the π molecular orbitals of a conjugated diene shown below: -Draw the product(s) you would expect to obtain from photochemical cyclization of (2Z,4E)-hexadiene.

Draw the structure of the product when the following substance reacts with maleic anhydride.Classify the reaction according to the number of π electrons that interact.Atoms other than carbon and hydrogen are labeled.

Exhibit 30-1 To answer the following question(s) ,consider the π molecular orbitals of a conjugated diene shown below: -Refer to Exhibit 30-1.Which molecular orbital of a ground-state conjugated diene is the highest occupied molecular orbital (HOMO) ?

Exhibit 30-7 Consider the Sommelet-Hauser rearrangement below to answer the following question(s): -Refer to Exhibit 30-7.Would you expect the Sommelet-Hauser rearrangement to be antarafacial or suprafacial? Explain.

Consider the following MO diagram for a conjugated triene. When irradiated with light of the appropriate wavelength,how many electrons will be in bonding MO's?

Exhibit 30-1 To answer the following question(s) ,consider the π molecular orbitals of a conjugated diene shown below: -Refer to Exhibit 30-1.Which molecular orbital of a conjugated diene contains two nodes between nuclei?

Classify the following reaction.

Exhibit 30-5 To answer the following question(s) ,consider the reaction below: -Refer to Exhibit 30-5.What type of pericyclic reaction is involved in this transformation?

Consider the reaction given below. Which of the following is correct?

Exhibit 30-4 Consider the reaction below to answer the following question(s): -Refer to Exhibit 30-4.Would you expect this reaction to occur under photochemical or thermal conditions?

Exhibit 30-4 Consider the reaction below to answer the following question(s) : -Refer to Exhibit 30-4.What type of pericyclic reaction is involved in this transformation?

Classify the following reaction.