This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The mnemonic phrase The Electrons Circle Around, TECA, assists in predicting stereochemistry of ... (Read 58 times)

ahriuashd

  • Hero Member
  • *****
  • Posts: 535
on: Aug 23, 2018
The mnemonic phrase The Electrons Circle Around, TECA, assists in predicting stereochemistry of pericyclic reactions. Describe application of this mnemonic.

Question 2

There are three major classes of pericyclic reactions. Which of the following types of reactions is not an example of a pericyclic process?
 a. sigmatropic rearrangements
  b. cycloaddition reactions
  c. annulation reactions
  d. electrocyclic reactions


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

akpaschal

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Aug 23, 2018
Answer to Question 1

The mnemonic TECA assists us in remembering that Thermal pericyclic reactions with Even numbers of electrons will occur with Conrotatory or Antarafacial stereochemistry. As a result, the following statements also apply: Photochemical pericyclic reactions with even numbers of electrons will occur with disrotatory or suprafacial stereochemistry. Thermal pericyclic reactions with odd numbers of electrons will occur with disrotatory or suprafacial stereochemistry. Photochemical pericyclic reactions with odd numbers of electrons will occur with conrotatory or antarafacial stereochemistry.

Answer to Question 2

c


ahriuashd

  • Member
  • Posts: 535
Reply 2 on: Aug 23, 2018
:D TYSM

  • Member
  • Posts:
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Electrons Are Shared in Covalent Bonds Electrons Are Shared in Covalent Bonds
Hand mnemonic for the basic atmosphere composition being 4/5 nitrogen and 1/5 oxygen. Hand mnemonic for the basic atmosphere composition being 4/5 nitrogen and 1/5 oxygen.
Covalent bonds form by the sharing of electrons Covalent bonds form by the sharing of electrons
The Circle of Relationship Issues and Sexual Problems The Circle of Relationship Issues and Sexual Problems
How to evaluate angles using cosine, special triangles, the unit circle (Part 2) How to evaluate angles using cosine, special triangles, the unit circle (Part 2)
Which color is placed at the center of the circle? Which color is placed at the center of the circle?
Video: X chromosome inactivation in calico cats

For a complete list of videos, visit our video library