6. Propose structures for each of the following molecules whose HNMR spectral information is given below.A. Molecular formula: C3H7BrO Proton NMR:
Multiplet (2H) at 2.11 ppm
Singlet (1H) at 2.70 ppm
Triplet (2H) at 3.52 ppm
Triplet (2H) at 3.78 ppmB. Molecular formula: C4H8Cl2Proton NMR:
Doublet (3H) at 1.56 ppm
Multiplet (2H) at 2.12 ppm
Triplet (2H) at 3.70 ppm
Multiplet (1H) at 4.25 ppm. Molecular formula: C10H12O2Proton NMR:
Doublet (6H) at 1.13 ppm
Heptet (1H) at 2.98 ppm
Doublet (2H) at 7.15 ppm
Doublet (2H) at 8.03 ppm
Singlet (1H) at 12.48 ppmD. Molecular formula: C3H9NProton NMR: Triplet (3H) at 1.05 ppmSinglet (3H) at 2.28 ppmQuartet (2H) at 2.53 ppmSinglet (1H) at 4.84 ppm