The manner of ring closure-conrotatory or disrotatory- for both thermal and photochemical cyclization of (2E,4Z,6Z,8E)-2,4,6,8-decatetraene in to 7,8-dimethyl-1,3,5-cyclooctatriene indicating the stereochemistry is to be stated. Concept introduction: An electrocyclic reaction involves the cyclization of a conjugated acyclic system. These reactions are reversible and are highly stereospecific. In elecrocyclic reactions involving even number of electron pairs, a thermal reaction occurs in conrotatory manner and a photochemical reaction occurs in disrotatory manner. In elecrocyclic reactions involving odd number of electron pairs, a thermal reaction occurs in disrotatory manner and a photochemical reaction occurs in conrotatory manner. To predict: The manner of ring closure-conrotatory or disrotatory- for both thermal and photochemical cyclization of (2E,4Z,6Z,8E)-2,4,6,8-decatetraene in to 7,8-dimethyl-1,3,5-cyclooctatriene. The stereochemistry of the product.

Question

3. a. Use the periodic table to add up the molecular weight of thionyl chloride (SOCl2) and show your work. b. The actual value obtained for the molecular ion on a high resolution mass spectrometer is 117.9041. Explain the discrepancy. c. Show the calculations that correctly result in the exact mass of 117.9041 for SOC₁₂. Use Table 11.2 or Appendix E in your calculations.

Answer 1

Question

Chapter 30.SE, Problem 22AP

Interpretation Introduction

Interpretation:

The manner of ring closure-conrotatory or disrotatory- for both thermal and photochemical cyclization of (2E,4Z,6Z,8E)-2,4,6,8-decatetraene in to 7,8-dimethyl-1,3,5-cyclooctatriene indicating the stereochemistry is to be stated.

Concept introduction:

An electrocyclic reaction involves the cyclization of a conjugated acyclic system. These reactions are reversible and are highly stereospecific.

In elecrocyclic reactions involving even number of electron pairs, a thermal reaction occurs in conrotatory manner and a photochemical reaction occurs in disrotatory manner.

In elecrocyclic reactions involving odd number of electron pairs, a thermal reaction occurs in disrotatory manner and a photochemical reaction occurs in conrotatory manner.

To predict:

The manner of ring closure-conrotatory or disrotatory- for both thermal and photochemical cyclization of (2E,4Z,6Z,8E)-2,4,6,8-decatetraene in to 7,8-dimethyl-1,3,5-cyclooctatriene.

The stereochemistry of the product.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

3. a. Use the periodic table to add up the molecular weight of thionyl chloride (SOCl2) and show your work. b. The actual value obtained for the molecular ion on a high resolution mass spectrometer is 117.9041. Explain the discrepancy. c. Show the calculations that correctly result in the exact mass of 117.9041 for SOC₁₂. Use Table 11.2 or Appendix E in your calculations.

6. Draw the molecular orbital diagram shown to determine which of the following is paramagnetic. B₂2+ B22+, B2, C22, B22- and N22+ Molecular Orbital Diagram B2 C22- B22- N22+ Which molecule is paramagnetic?

Don't used hand raiting