The proton-coupled 13 C NMR spectrum for the given compounds has to be described and also relative positions of the signals has to be indicated. Concept introduction: The signals in the spectrum of a compound are proportional to the number of carbons that are present in the different environment within the molecule. The carbon which is present in the electron-rich environment shows a signal at a lower frequency and vice-versa. Therefore, the carbons that are present nearest to the electron-withdrawing groups produce a high-frequency signal. The 13 C NMR spectra in which splitting of the signal for carbon due to the protons attached to that carbon also considered is called proton-coupled 13 C NMR spectra. The splitting of the signal is determined according to the ( N + 1 ) rule. The coupling between the carbon and the protons attached to it is called heteronuclear coupling.

Question

option choice: Isoleucine Histidine Threonine Alanine Lysine Aspartate Tryptophan Tyrosine Leucine Arginine Cysteine Asparagine Valine Glutamine Glycine Methionine Serine Proline Phenylalanine Glutamate

Answer 1

Question

Chapter 14.20, Problem 42P

Interpretation Introduction

Interpretation:

The proton-coupled 13C NMR spectrum for the given compounds has to be described and also relative positions of the signals has to be indicated.

Concept introduction:

The signals in the spectrum of a compound are proportional to the number of carbons that are present in the different environment within the molecule. The carbon which is present in the electron-rich environment shows a signal at a lower frequency and vice-versa. Therefore, the carbons that are present nearest to the electron-withdrawing groups produce a high-frequency signal.

The 13C NMR spectra in which splitting of the signal for carbon due to the protons attached to that carbon also considered is called proton-coupled 13C NMR spectra. The splitting of the signal is determined according to the (N+1) rule.

The coupling between the carbon and the protons attached to it is called heteronuclear coupling.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

option choice: Isoleucine Histidine Threonine Alanine Lysine Aspartate Tryptophan Tyrosine Leucine Arginine Cysteine Asparagine Valine Glutamine Glycine Methionine Serine Proline Phenylalanine Glutamate

sketch the nature of the metal-alkylidene bonding interactions.

Part C The perspective formula of isoleucine, an amino acid, is provided below. HOOC H₂NIC H 川 CH3 CH,CH3 Draw the Newman projection in staggered conformation for isoleucine by viewing the molecule along the C-2-C-3 bond. 1. Edit the Newman projection on the canvas. 2. Replace the appropriate hydrogens with the appropriate -CH3 or other groups. 3. If you need to start over, Undo or choose a Newman projection from the Templates toolbar (bottom). Important: Never delete the hydrogen atoms or bonds directly attached to the template, and do not move them by dragging or dropping them. That will break the projections structures. Only replace them! ▸ View Available Hint(s) 0 2 H± 3D EXP. L ד י CONT. 2 H 0 N о