QUESTION 3 a) Define the following;. i) NMR spectrum. ii) Chemical shift. (2 marks) b) Give the relationship between the strength of the magnetic field, energy and the resonance frequency of NMR. (1 mark) c) State three (3) rules that govern the splitting patterns in the proton NMR spectra of organic compounds. (3 marks) d) Name the variables that characterize NMR with their appropriate units. (2 marks) e) List four (4) features of proton NMR responsible for giving insight into the structure of a compound. (2 marks) Describe how the position of the proton signals of the following compounds will relatively absorb in the Proton NMR. (4 marks) i) CH3CH2Cl ii) BrCH2CH2F iii) CICHCHCl