Using NMR coupling constants, it is to be explained that how does the given two compounds should be distinguished from one another. Concept introduction: Axial bonds are parallel to the axis of ring and equatorial bonds are perpendicular to the axis of ring. The dihedral angle between two axial bonds is ϕ = 180 ° and dihedral angle between axial and an equatorial bond is ϕ = 60 ° . The coupling constant J ( a x , a x ) between two vicinal axial hydrogens of cyclohexane is around the value of 8 − 10 Hz and the couple constant between vicinal axial and equatorial protons, i.e., J ( a x , e q ) is around 2 − 3 Hz .

Question

Want to see the full answer?

Answer 1

Question

Chapter 9, Problem 12PP

Interpretation Introduction

Interpretation:

Using NMR coupling constants, it is to be explained that how does the given two compounds should be distinguished from one another.

Concept introduction:

Axial bonds are parallel to the axis of ring and equatorial bonds are perpendicular to the axis of ring.

The dihedral angle between two axial bonds is ϕ=180° and dihedral angle between axial and an equatorial bond is ϕ=60°.

The coupling constant J(ax,ax) between two vicinal axial hydrogens of cyclohexane is around the value of 8−10 Hz and the couple constant between vicinal axial and equatorial protons, i.e., J(ax,eq) is around 2−3 Hz.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Give the structure(s) of the product(s) the reaction below, and be sure to indicate any relative stereochemistry (you can assume that each of the Diels-Alder reactions will proceed with endo selectivity). Draw out relevant enantiomer(s) if they are expected to form. If no reaction is expected to occur under the indicated conditions, then write "no reaction" or NR, and explain why you would expect nothing to occur. If more than one product is formed, please indicate which one will be the major product or if they will be formed in equal amounts. In all cases, equimolar amounts of both components/reagents are present unless indicated otherwise I'm struggling to see how this reaction will go! I am wondering if it will cycle on itself but I'm not sure how I drew out a decagon but I'm a bit lost

Give the structure(s) of the product(s) for the reactions below, and be sure to indicate any relative stereochemistry (you can assume that each of the Diels-Alder reactions will proceed with endo selectivity). Draw out relevant enantiomer(s) if they are expected to form. If no reaction is expected to occur under the indicated conditions, then write "no reaction" or NR, and explain why you would expect nothing to occur. If more than one product is formed, please indicate which one will be the major product or if they will be formed in equal amounts. In all cases, equimolar amounts of both components/reagents are present unless indicated otherwise .

Calculate the residence time of strontium (Sr2+) in the world ocean, given that the average concentration of strontium in the world’s rivers is approximately 0.87 µmol L-1 (5 pts).