Compound D has the composition 77.8% carbon, 7.41% hydrogen and 14.8% oxygen.

Question
Compound D has the composition 77.8% carbon, 7.41% hydrogen and 14.8% oxygen. It mass and 1H NMR spectra are shown below. a. b. a. Calculate the empirical formula of D. b. From the mass spectrum, find the molecular mass of D (ignoring the 13C peak) and hence it molecular formula. c. i. Draw displayed formulae for five possible isomers of D that contain a benzene ring. ii. Use the 1H NMR spectrum of D to decide which isomer is D. iii. Explain your reasoning. d. Explain the main features of the NMR spectrum of D.

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