Propose a structural formula for compound A, C,H,N, given its IR and 'H-NMR spectra. Micrometers 25 10 11 12 13 14 15 20 100 90 80 60 50 40 30 20 10 Compound A 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 600 400 Wavenumber (cm ) CSH13N Compound A 9H 2H 10 9. 7. 6. 5 4 3. 2 0 ppm Chemical shifl (8) Transmittance (%)
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- A compound of unknown structure gave the following spectroscopic data: Mass spectrum: M+=88.1 IR: 3600 cm-1 1ΗNMR: 1.4 δ (2 H, quartet, J=7 Hz); 1.2 δ (6H, singlet): 1.0 δ (1 H, singlet); 0.9 δ (3 H, triplet, J=7 Hz) 13CNMR: 74, 35, 27, 25 δ (a) Assuming that the compound contains C and H but may or may not contain O, give three possible molecular formulas (b) How many protons (H) does the compound contain? (c) What functional groups(s) does the compound contain? (d) How many carbons does the compound contain? (e) What is the molecular formula of the compound? (f) What is the structure of the compound? (g) Assign peaks in the molecule’s 1HNMR spectrum corresponding to specific protons.3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled with both the C1 vinylic proton (J = 16 Hz) and the C3 methylene protons (J = 8 Hz). Draw a tree diagram for the C2 proton signal, and account for the fact that a five-line multiplet is observed.Compound F, a hydrocarbon with M+=96 in its mass spectrum, undergoes reaction with HBr to yield compound G. Propose structures for F and G, whose 13C NMR spectral data are given below. Compound F Broadband-decoupled 13C NMR: 27.6, 29.3, 32.2, 132.4 DEPT-90: 132.4 DEPT-135: positive peak at 132.4 ; negative peaks at 27.6, 29.3, 32.2 Compound G Broadband-decoupled 13C NMR: 25.1, 27.7, 39.9, 56.0 DEPT-90: 56.0 DEPT-135: positive peak at 56.0 ; negative peaks at 25.1, 27.7, 39.9
- Draw the structure of the compound identified by the simulated 'H NMR and 13C NMR spectra. The molecular formula of the compound is C1,H120. (Blue numbers next to the lines in the 'H NMR spectra indicate the integration values.) Η NMR 1H 2H 2H 2H 2H 3H| 10 8 4 2 8 (ppm) 13C NMR 220 200 180 160 140 120 100 80 60 40 20 d (ppm)A compound has the molecular formula: C4H8O2 and gives the following C-13 NMR spectrum. Provide the most likely functional groups for each signal. nmrsim presentation 1 1 C:Bruken Topspin3.5pl7 examdata -170.7658 150 100 d 170.8 (O CH3) ; 60.4 (OCH2); 20.8, 14.1 (2 x C=0) 8170.8 (0 CH₂); 60.4 (OCH₂); 20.8, 14.1 (2 x CH3). 8 170.8 (CH3); 60.4 (C-0); 20.8, 14.1 (2 x OCH₂) 8170.8 (C=0); 60.4 (OCH₂); 20.8, 14.1 (2 x CH3). 8170.8 (C) ; 60.4 (O CH2); 20.8, 14.1 (2 x O CH3) -60.4293 50 -20.7902 -14.1385 [ppm] [+]1) Propose the structures for the following 1H and 13C NMR spectrum. b) Molecular Formula: C8H8O3 1H-NMR, CDCl3 Solvent, Molecular Formula: C8H8O3 13C-NMR, CDCl3 Solvent, Molecular Formula: C8H8O3 in the pictures
- 5. Determine the structure of a compound with a molecular formula of C4H8O2 with the 13C and 'H NMR spectra below. No peaks exchange with D20 on the 'H NMR spectrum. ada I=2 |=3 1=3 1.2 4.0 4.0 3.0 2.0 1.0How could 1H NMR spectroscopy be used to distinguish between attachedpair of compoundsFollowing is a 'H-NMR spectrum for a compound of molecular formula C,H,,0. From the integration, calculate the number of hydrogens giving rise to each signal. C,H1,02 26 18 44 10 9 8 7 6. 4 3 2 1 0 ppm Chemical shift (8)
- 1) Propose the structures for the following 1H and 13C NMR spectra. a) Molecular Formula: C5H10O2 1H-NMR, CDCl3 Solvent, Molecular Formula: C5H10O2 13C-NMR, CDCl3 Solvent, Molecular Formula: C5H10O2 in the picturesPropose a structure for a compound with molecular formula C3H180 that exhibits the following 'H NMR and 13C NMR spectra: Proton NMR 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Chemical shift (ppm) Carbon NMR -70.5 31.6 19.3 13.7 70 60 50 40 30 20 10 Chemical shift (ppm)How could 1H NMR spectroscopy be used to distinguish betweencompounds X and Y?