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2. Use the H NMR and IR data to determine the structure of the following compounds and name them. Compound A Molecular formula: CroH IR absorptions at N/A H NMR data: 1.3 (singlet, 9H), 7.0 to 7.5 (multiplet, 5H) ppm Compound B Molecular formula: CHO IR absorptions at 1H NMR data: 1735-1745, 1050 cm 0.93 (doublet, 6H), 1.52 (multiplet, 2H), 1.69 (multiplet, 1H), 2.04 (singlet, 3H), and 4.10 (triplet,2H) ppm Compound C Molecular ion: IR absorptions at 1710 cm 1H NMR data: 1.0 (triplet, 3H), 2.1 (singlet, 3H), 2.4 72 (quartet, 2H) ppm Compound ID Molecular formula: CHisO2 IR absorptions at 1735-1745, 1050 cm 1H NMR data: 0.94 (doublet, 6H), 1.15 (triplet, 3H), 1.91 (multiplet, 1H), 2.33 (quartet, 2H), and 3.86 (doublet,2H) ppm
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