Which is the order of increasing $\delta$ values in the ¹³C NMR spectra for the following carbon atoms?
CH₄ CH₃F CH₃Br CH₃OH CH₃Cl
I II III IV V

Question

Which is the order of increasing $\delta$ values in the ¹³C NMR spectra for the following carbon atoms? CH₄ CH₃F CH₃Br CH₃OH CH₃Cl I II III IV V

Quizplus · Accepted Answer

The order of increasing chemical shift values in ^13C NMR spectra for the given compounds is influenced by the electronegativity of the substituents attached to the carbon atom. The more electronegative the substituent, the greater the deshielding effect, and hence, the higher the chemical shift value. Hydrogen (in CH4) is the least electronegative, followed by bromine (in CH3Br), chlorine (in CH3Cl), hydroxyl (in CH3OH), and fluorine (in CH3F) being the most electronegative. Therefore, the order is CH4 (I), CH3Br (III), CH3Cl (V), CH3OH (IV), CH3F (II).

Which Is the Order of Increasing δ\deltaδ Values in the 13C NMR Spectra for the Following Carbon

Which Is the Order of Increasing $\delta$ Values in the ¹³C NMR Spectra for the Following Carbon