Identify each of the following compounds from their spectra. (a) Compound A: molecular mass 113; gives a
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(a) Compound A: molecular mass 113; gives a positive hydroxamate test; IR 2237, 1733, 1200 cm-1; proton NMR: δ 1.33 (3H, t, J = 7 Hz), δ 3.45 (2H, s), δ 4.27 (2H, q, J = 7 Hz).
(b) Compound C: molecular mass 71; IR: 3200 (strong, broad), 2250 cm-1; no absorptions in the 1500-2250 cm-1 range; proton NMR: δ 2.62 (2H, t, J = 6Hz), δ 3.42 (1H, broad s; eliminated by D2O shake), δ 3.85 (2H, t, J = 6Hz).
(c) Compound E: UV spectrum: λmax = 272 nm (ε = 39,500); El mass spectrum: m/z = 129 (molecular ion and base peak); IR: 2200, 970 cm-1; proton NMR: δ 5.85 (1H, d, J = 17 Hz); δ 7.35 (177, d, J = 17 Hz); δ 7.4 (5H, apparent s).
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a The odd molecular mass indicates the presence of an odd number of nitrogens and the hydroxamate te...View the full answer
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