Concept explainers
(a)
Interpretation:
The structure of the molecule
Concept introduction:
Nuclear magnetic resonance is a type of spectroscopy in which number of different kind of protons present in different environment can be detected. The
(b)
Interpretation:
The structure of the molecule
Concept introduction:
Nuclear magnetic resonance is a type of spectroscopy in which number of different kind of protons present in different environment can be detected. The
(c)
Interpretation:
The structure of the molecule
Concept introduction:
Nuclear magnetic resonance is a type of spectroscopy in which number of different kind of protons present in different environment can be detected. The
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EBK ORGANIC CHEMISTRY
- Cyclohex-2-enone has two protons on its carbon–carbon double bond (labeled Ha and Hb) and two protons on the carbon adjacent to the double bond (labeled Hc). (a) If Jab = 11 Hz and Jbc = 4 Hz, sketch the splitting pattern observed for each proton on the sp2 hybridized carbons. (b) Despite the fact that Ha is located adjacent to an electron-withdrawing C = O, its absorption occurs upeld from the signal due to Hb (6.0 vs. 7.0 ppm). Offer an explanation.arrow_forwardIdentify the relationship between the following pair of structures by describing them as represting enantiomers, diastereomers, constitutional isomers or two molecules of the same compounds (a) (c) H H₂C H F Br Oll F CH3 Br H and Br. CH3 H and Fumus (d) H H X-X=-= CH3 H CH3 (b) Br HO CHO and -OH H C(O)CH3 and HO H- CHO -H -OH C(O)CH3arrow_forwardThere are several isomeric alkanes of molecular formula C6H14. Two of these exhibit the following 1H-NMR spectra. Propose a structure for each of the isomers. Isomer A: δ = 0.84 (d, 12 H), 1.39 (septet, 2H) ppm Isomer B: δ = 0.84 (t, 3 H), 0.86 (t, 9H), 1.22 (q, 2H) ppmarrow_forward
- (1) C (CH ),CO K (CH2),COH Сн,о- Д НО Aarrow_forwardSuppose you have two bottles, labeled ketone A and ketone B. You know that one bottle contains CH3CO(CH2)5CH3 and one contains CH3CH2CO(CH2)4CH3, but you do not know which ketone is in which bottle. Ketone A gives a fragment at m/z = 99 and ketone B gives a fragment at m/z = 113. What are the likely structures of ketones A and B from these fragmentation data?arrow_forwardConsider the following three compounds: CH,=CH, CH,=CH-CH=CH, CH,=CH-CH=CH-CH=CH, (1) (2) (3) Compound 1 contains a simple isolated carbon-carbon double bond, but the other two have conjugated double bonds. (i) Which compound will have the largest absorption (max) Value? (ii) Give a reason for your answer in part (b)(i).arrow_forward
- (b) Complete the following reactions : (i) D H3C CH3 H H كما .NO2 B | Bra/Dioxane .COCH3 Aarrow_forwardUse Apendix C or Figure 18.9 to determine whether Kc > 1 or Kc < 1 for each reaction. (a) H2SO3 + NH3 HSO3- + NH4+ Kc < 1 or Kc > 1 (b) HCN + HCO3- H2CO3 + CN - Kc < 1 or Kc > 1arrow_forward(b) Consider Scheme Q21b: (i) OH im i base Scheme Q21b E What type of reaction is taking place that convert D to E? (ii) Redraw structure E then circle the substituents on the double assign priorities according to the Cahn-Ingold-Prelog rules. (iii) Derive the IUPAC name of structure E.arrow_forward
- 5-34 Eight alcohols have the formula C5H120. Draw them. Which are chiral? 5-35 Draw compounds that fit the following descriptions: (a) A chiral alcohol with four carbons (b) A chiral carboxylic acid with the formula C5H1002 (c) A compound with two chirality centers (d) A chiral aldehyde with the formula C3H5BrOarrow_forwardIdentify the relationship between the following pair of structures by describing them as represting enantiomers, diastereomers, constitutional isomers or two molecules of the same compounds (a) (c) H CH3 Br. CH3 Br f-f and Filmas H H CH3 H F Oll H CHO Br X-X ²=-= -OH HO and and H Br H- F C(O)CH, H (b) CH3 (d) H- and HO CHO -H -OH C(O)CH3arrow_forwardThere are several isomeric alkanes of molecular formula C6H14.Two of these exhibit the following 1H-NMR spectra. Propose a structure for each of the isomers. Isomer A: δ = 0.84 (d, 12 H), 1.39 (septet, 2H) ppm Isomer B: δ = 0.84 (t, 3 H), 0.86 (s, 9H), 1.22 (q, 2H) ppmarrow_forward