Which of the carbon atoms in the following molecule appears furthest downfield in the ¹³C NMR spectrum?

Question

Quizplus · Accepted Answer

The carbon with the highest chemical shift will appear furthest downfield in the NMR spectrum. In this molecule, carbon iii is directly bonded to two electronegative oxygen atoms, which deshields the carbon and results in a higher chemical shift. Therefore, carbon iii will appear furthest downfield in the NMR spectrum.

Which of the Carbon Atoms in the Following Molecule Appears