Observe the following 'H NMR spectrum of a compound dissolved in deuterated water: Which of the following compounds could this spectrum correspond to? Singlete Integral: 2,98 Cuadruplete Integral: 2,05 Triplete Integral: 3,08 (A). HCOO—CH2—CH2–CH3 (B). H3C-COO-CH2-CH3 (C). H3C-CH(CH3)-COOH (D). None of the above ppm

The 'H NMR spectrum of compound A (C3H100) has four signals: a multiplet at 8 = 7.25-7.32 ppm (5 H), a singlet at d = 5.17 ppm (1 H), a quartet at d = 4.98 ppm (1 H), and a doublet at ô = 1.49 ppm (3 H). There are 6 signals in its 13C NMR spectrum. The IR spectrum has a broad absorption in the -3200 cm-1 region. Compound A reacts with KMNO4 in a basic solution followed by acidification to give compound B with the molecular formula C7H6O2. Draw structures for compounds A and B.

There are four esters with molecular formula C4H8O2. How can they be distinguished by 1H NMR?

what is is the structure of a compound of molecular formula c 10 h 14 o 2 that shows a strong ir absorption at 3150-2850 cm − 1 and give the following 1 h nmr absorptions: 1.4 (triplet, 6 h), 4.0 (quarter, 4h), and 6.8 (singlet, 4h) ppm?

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Ethyl benzoate PhCO₂Et has these peaks in its 13C NMR spectrum: 17.3, 61.1, 100- 150 (four peaks) and 166.8 ppm. Which peak belongs to which carbon atom? Draw the structure of ethyl benzoate and clearly identify each carbon with its corresponding chemical shift.

Compound A, with molecular formula C4H9Cl, shows two signals in its 13C NMR spectrum. Compound B, an isomer of compound A, shows foursignals, and in the proton-coupled mode, the signal farthest downfield is a doublet. Identify compounds A and B.

5) For the following questions draw the structure of the compound based off of the molecular formula and NMR that is given. a) C9H20 b) C10H12O2 brs, 1H t, 12H 9.8H PPM 1,3H d, 2H d, 2H 1q.2H 1,2H Draw the structure of the compound. C₂H20 Draw the structure of the compound. C₁0H1202 PPM c) CH10O3 (compound contains two functional groups with carbonyls) Don't worry about stereochemistry of the product. s, 1H d) CsH8O3 brs, 1H 10 9.1H dt, 1H PPM J=17 Hz DOM 9.2H d, 3H 1,3H Draw the structure of the compound. C7H1003 1,2H Draw the structure of the compound. brs, 1H d, 1H dt, 2H 0 C₂H₂O₂

Draw the structure of all constitutional isomers that contain a ketone and have molecular formula C3H1,0. Give the IUPAC name for each isomer and state how 1°C NMR spectroscopy could be used to distinguish these isomers.

The H NMR spectrum of an unknown compound has a signal at 3.8 ppm that integrates for three hydrogens and is a singlet. Which of the following is the unknown? OCH; OH