The Proton-1H NMR spectrum for 2,3 diphenylquinoxaline is the following:

1. Explain the chemical shift of each signal that appears in the spectrum. ( explain the electron environment of all carbons )

2. Explain integration and multiplicity of each signal that appears in the spectrum.

3. Explain the symmetry / equivalence (if applicable) of each signal that appears in the spectrum.

8. 7 5 4. 3 2 ppm