The 1H-NMR spectrum in the figure is of a compound dissolved in deuterated water. To which of the following? (1). HCOO—CH2–CH2–CH3 (2). H3C-COO-CH2-CH3 (3). H3C-CH(CH3)-COOH (4). It cannot be any of the above. Singlete Integral: 2,98 Cuadruplete Integral: 2,05 Triplete Integral: 3,08 ppm

Which of the following would you expect for the proton signals in the 1H NMR spectrum of the molecule show below? B A: triplet: integration: 3 B: quartet; integration: 2 A: triplet, integration: 6 B: quartet, integration: 2 A: triplet, integration: 2 B: quartet, integration: 3 A: quartet; integration: 3 B: triplet; integration: 2 (H₂C) A H₂ B H₂ (CH3) A

The MS and 13C NMR spectra for two constitutional isomers with 4 degrees of unsaturation are shown below. Determine the molecular structures of the two constitutional isomers.

The MS and 13C NMR spectra for two constitutional isomers are shown. They have 4 degrees of unsaturation. Determine the molecular structures of the two constitutional isomers.