Q4: Identify the structure of compound B, based on NMR data and molecular formula as indicated below (5 marks): Compound B, C,H,O 6. doublet 1. Septet . PPM Compound B, CHO 220 200 180 760 140 120 PPM 100 80 do 40 20 Name: ? Labday: Thor Fr? Solution: Structure of compound Hint: 1) Find out Degree of Unsaturation (U) 2) Check for the no. of signals, integration, splitting pattern and chemical shift in H NMR 3) Check the chemical shift and no. of signals in C NMR 4) Try to fit the information to justify the given molecular formula