Repeat Problem 13-25, sketching the off-resonance-decoupled${13}_{\mathrm{C}}$spectra of the compounds.

In an off-resonance decoupled carbon-NMR spectrum, the coupling between each carbon atom and each hydrogen atom attached directly to it is observed.When off-resonance decoupling is used, the apparent magnitude of the coupling constants is reduced and overlap of the resulting multiplets is less frequent problem. The off-resonance decoupled spectrum retains the couplings between the carbon atom and directly attached protons but removes the couplings between the carbon and more remote protons.

Off-resonance decoupled carbon-NMR spectrum of part (a) molecule have been drawn with chemical shifts values indicated in the spectrum along with carbons which are responsible for peaks have also been assigned.

In an off-resonance decoupled carbon-NMR spectrum, the coupling between each carbon atom and each hydrogen atom attached directly to it is observed. When off-resonance decoupling is used, the apparent magnitude of the coupling constants is reduced and overlap of the resulting multiplets is less frequent problem. The off-resonance decoupled spectrum retains the couplings between the carbon atom and directly attached protons but removes the couplings between the carbon and more remote protons.

Off-resonance decoupled carbon-NMR spectrum of part (b) molecule have been drawn with chemical shifts values indicated in the spectrum along with carbons which are responsible for peaks have also been assigned.

In an off-resonance decoupled carbon-NMR spectrum, the coupling between each carbon atom and each hydrogen atom attached directly to it is observed. When off-resonance decoupling is used, the apparent magnitude of the coupling constants is reduced and overlap of the resulting multiplets is less frequent problem. The off-resonance decoupled spectrum retains the couplings between the carbon atom and directly attached protons but removes the couplings between the carbon and more remote protons.

Off-resonance decoupled carbon-NMR spectrum of part (c) molecule have been drawn with chemical shifts values indicated in the spectrum along with carbons which are responsible for peaks have also been assigned.

In an off-resonance decoupled carbon-NMR spectrum, the coupling between each carbon atom and each hydrogen atom attached directly to it is observed. When off-resonance decoupling is used, the apparent magnitude of the coupling constants is reduced and overlap of the resulting multiplets is less frequent problem. The off-resonance decoupled spectrum retains the couplings between the carbon atom and directly attached protons but removes the couplings between the carbon and more remote protons.

Off-resonance decoupled carbon-NMR spectrum of part (d) molecule have been drawn with chemical shifts values indicated in the spectrum along with carbons which are responsible for peaks have also been assigned.