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The homologous series of primary
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- Carvone is an unsaturated ketone responsible for the odor of spearmint. If carvone has M+=150 in its mass spectrum and contains three double bonds and one ring, what is its molecular formula?arrow_forward5. Tyrosine is an important amino acid in Biochemistry. Assign the peaks in the 'H-NMR to the hydrogens in the structure of tyrosine by placing a, b, c, and d in the appropriate corresponding boxes. The hydrogen atoms attached to O and N atoms do not need to be labeled on this spectrum. с 11 10 16 00 a H. H- H H -*|| NH₂ Tyrosine d -H ppmarrow_forwardThe proton ¹H (Hydrogen) NMR of a compound, C7H7CI, has the following peaks. Which compound below best fits the data? 10 9 HPM-01-022 2H Doublet 8 7 2H Doublet 6 5 ppm 4 3H Singlet 3 2 1 0arrow_forward
- 2. Consider the two ¹H NMR spectra sketched below that correspond to the molecule shown. Assign the peaks in each spectrum to the different sets of equivalent protons in the molecule. Why do the spectra for this molecule look different when measured at different temperatures? IN 84°C M 38°C 3 N 1 ppmarrow_forwardWhich of the following molecules matches the given data? (Note: All the molecules have a M+ = m/z 102) C5H10O2 base peak = m/z 43arrow_forward10. The proton NMR of a compound has the following peaks. Which compound below best fits the data? A OCH₂CH₂Cl NO₂ B OH CH-CH3 CI broad singlet 55.17 (1H) doublet o 1.49 (3H) quartet & 5.00 (1H) doublet o 7.22 (2H) doublet o 7.38 (2H) C CH₂ CH2-OH CH₂ D CH₂-OH CIarrow_forward
- у Give the major peak that would be present in the functional group re following compounds: 2800 OH OH 2700 hydovcoad a ing row X Xarrow_forward(3) These natural compounds will have different numbers of 1H-NMR signals in different NMR solvents like CDC13 and methanol-d4. How many signals do you anticipate for each compound respectively in CDC13 and methanol-d4? LOCH 3 OHC. vanillin OH LOH acetoaminophen HO thymolarrow_forward1. 1H-NMR spectrum of 1,3-propanediol (HO-CH2-CH2-CH2-OH) shows a quintet at 1.81 ppm, a singlet at 2.75 pm, and a triplet at 3.83 ppm. Assign each signal to the protons it corresponds to in the molecule. Explain the splitting pattern observed for each signal.arrow_forward
- 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] [+]arrow_forwardMost common amines (RNH2) exhibit pKa values between 35 and 45. R represents the rest of the compound (generally carbon and hydrogen atoms). However, when R is a cyano group, the pKa is found to be drastically lower: H H Incorrect. 人 R N H PK = 35-45 N N H PK = = 17 (a) Explain why the presence of the cyano group so drastically impacts the pKa. ○ When R is a cyano group, the acidic proton is on an sp-hybridized atom. ○ When R is a cyano group, the conjugate base is destabilized by resonance. ○ When R is a cyano group, the conjugate base is destabilized by inductive effects. ● When R is a cyano group, the conjugate base is stabilized by resonance.arrow_forwardWhich of the following molecules will have a base peak at (M – 43)arrow_forward