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- Each compound gives only one signal in its 1H-NMR spectrum. Propose a structural formula for each compound. Q.) C2H6OIdentify the carbon atoms that give rise to the signals in the 13C NMR spectrum of each compound. a.CH3CH2CH2CH2OH; 13C NMR: 14, 19, 35, and 62 ppm b.(CH3)2CHCHO; 13C NMR: 16, 41, and 205 ppm c.CH2=CHCH(OH)CH3; 13C NMR: 23, 69, 113, and 143 ppm7. Which structure is consistent with this ¹H NMR spectrum? a) b) H CH₂CH3 O c) CH3CH₂. O OCH3 O CH₂CH3 d) H₂C, OCH₂CH3 PPM
- 2H зн 3H 2H 2H 2H 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 PPM Determine the structure of A based on these spectra. Indicate clearly the signals for each type of protons for NMR analysis. Compound A gives NMR and IR spectra has the formula C3H1403Identify the carbon atoms that give rise to the signals in the 1°C NMR spectrum of each compound. a. CH;CH,CH,CH,OH; 1°C NMR: 14, 19, 35, and 62 ppm b. (CHa)2CHCHO; 1°C NMR: 16, 41, and 205 ppm c. CH2 = CHCH(OH)CH3; 1C NMR: 23, 69, 113, and 143 ppma. Assign a structure based on the following formula and H NMR. C4H100 6H 2H 1H 1H PPM
- Which compounds give a 'H NMR spectrum with two signals in a ratio of 2:3? a. CH;CH,CI b. CH;CH2CH3 c. CH;CH2OCH2CH3 d. CH;OCH,CH,OCH3Construct a structure of the given 1H NMR data signals.A. C5H12O 0.91 δ (3H, triplet) 1.19 δ (6H, singlet) 1.50 δ (2H, quartet) 2.24 δ (1H, singlet) B. C4H10O 0.90 δ (6H, doublet) 1.76 δ (1H, multiplet) 3.38 δ (2H, doublet) 3.92 δ (1H, singlet) C. C5H10O 1.09 δ (6H, doublet) 2.12 δ (3H, singlet) 2.58 δ (1H, septet)The 13C NMR spectrum of 3-pentanone is expected to signals representing the distinct carbons in the compound. The signal at highest show ppm would be at ppm. O three, three, -212 ppm O three, two, -80ppm O two, two, -180ppm O three, three, -160ppm
- Which carbon would have a signal farthest downfield in the 13C NMR spectrum for this molecule? d. CI H. C. a O A. a B. b OD.d E. eAnswer the following questions about each of the hydroxy ketones: 1-hydroxybutan-2-one (A) and 4-hydroxybutan-2-one (B). a.) What is the molecular ion in the mass spectrum?b.) What IR absorptions are present in the functional group region?c.) How many lines are observed in the 13C NMR spectrum?d.) How many signals are observed in the 1H NMR spectrum?e.) Give the splitting observed for each type of proton as well as its approximate chemical shift.1. If I took an NMR of tetracyclone, in what region(s) of the spectrum (ppm range) would I see peaks? 2. If I took an FTIR spectrum of tetracylone, what main peak(s) would I observe?