
Concept explainers
(a)
Interpretation:
Protons in the given compound that gives the signal at the lowest frequency ‘a’, at the next lowest ‘b’ and so on has to be labelled.
Concept introduction:
Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal.
The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region.
The more the deshielded or less shielded proton more will be its chemical shift value and the corresponding signal will be produced at the left-hand side or higher frequency region.
Proton or set of proton attached near to the more electronegative or electron withdrawing atoms is more deshielded or less shielded and vice versa.
Signal multiplicity: In proton NMR spectrum, protons may or may not be split into one or more peaks.
It is referred as singlet, doublet, triplet, quartet, pentet, and multiplet.
The signal multiplicity is follow
(b)
Interpretation:
Protons in the given compound that gives the signal at the lowest frequency ‘a’, at the next lowest ‘b’ and so on has to be labelled.
Concept introduction:
Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal.
The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region.
The more the deshielded or less shielded proton more will be its chemical shift value and the corresponding signal will be produced at the left-hand side or higher frequency region.
Proton or set of proton attached near to the more electronegative or electron withdrawing atoms is more deshielded or less shielded and vice versa.
Signal multiplicity: In proton NMR spectrum, protons may or may not be split into one or more peaks.
It is referred as singlet, doublet, triplet, quartet, pentet, and multiplet.
The signal multiplicity is follow
(c)
Interpretation:
Protons in the given compound that gives the signal at the lowest frequency ‘a’, at the next lowest ‘b’ and so on has to be labelled.
Concept introduction:
Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal.
The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region.
The more the deshielded or less shielded proton more will be its chemical shift value and the corresponding signal will be produced at the left-hand side or higher frequency region.
Proton or set of proton attached near to the more electronegative or electron withdrawing atoms is more deshielded or less shielded and vice versa.
Signal multiplicity: In proton NMR spectrum, protons may or may not be split into one or more peaks.
It is referred as singlet, doublet, triplet, quartet, pentet, and multiplet.
The signal multiplicity is follow
(d)
Interpretation:
Protons in the given compound that gives the signal at the lowest frequency ‘a’, at the next lowest ‘b’ and so on has to be labelled.
Concept introduction:
Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal.
The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region.
The more the deshielded or less shielded proton more will be its chemical shift value and the corresponding signal will be produced at the left-hand side or higher frequency region.
Proton or set of proton attached near to the more electronegative or electron withdrawing atoms is more deshielded or less shielded and vice versa.
Signal multiplicity: In proton NMR spectrum, protons may or may not be split into one or more peaks.
It is referred as singlet, doublet, triplet, quartet, pentet, and multiplet.
The signal multiplicity is follow
(e)
Interpretation:
Protons in the given compound that gives the signal at the lowest frequency ‘a’, at the next lowest ‘b’ and so on has to be labelled.
Concept introduction:
Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal.
The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region.
The more the deshielded or less shielded proton more will be its chemical shift value and the corresponding signal will be produced at the left-hand side or higher frequency region.
Proton or set of proton attached near to the more electronegative or electron withdrawing atoms is more deshielded or less shielded and vice versa.
Signal multiplicity: In proton NMR spectrum, protons may or may not be split into one or more peaks.
It is referred as singlet, doublet, triplet, quartet, pentet, and multiplet.
The signal multiplicity is follow
(f)
Interpretation:
Protons in the given compound that gives the signal at the lowest frequency ‘a’, at the next lowest ‘b’ and so on has to be labelled.
Concept introduction:
Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal.
The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region.
The more the deshielded or less shielded proton more will be its chemical shift value and the corresponding signal will be produced at the left-hand side or higher frequency region.
Proton or set of proton attached near to the more electronegative or electron withdrawing atoms is more deshielded or less shielded and vice versa.
Signal multiplicity: In proton NMR spectrum, protons may or may not be split into one or more peaks.
It is referred as singlet, doublet, triplet, quartet, pentet, and multiplet.
The signal multiplicity is follow

Want to see the full answer?
Check out a sample textbook solution
Chapter 10 Solutions
Essential Organic Chemistry (3rd Edition)
- Part 1. Draw monomer units of the following products and draw their reaction mechanism (with arrow pushing) Temporary cross-linked polymer Using: 4% polyvinyl alcohol+ methyl red + 4% sodium boratearrow_forwardcan you please answer both these questions and draw the neccesaryarrow_forwardcan you please give the answer for both these pictures. thankyouarrow_forward
- Part 1. Draw monomer units of the following products and draw their reaction mechanism (with arrow pushing) | Bakelite like polymer Using: Resorcinol + NaOH + Formalinarrow_forwardQuestion 19 0/2 pts 3 Details You have a mixture of sodium chloride (NaCl) and potassium chloride (KCl) dissolved in water and want to separate out the Cl- ions by precipitating them out using silver ions (Ag+). The chemical equation for the net ionic reaction of NaCl and KCl with silver nitrate, AgNO3, is shown below. Ag+(aq) + Cl(aq) → AgCl(s) The total mass of the NaCl/KCl mixture is 1.299 g. Adding 50.42 mL of 0.381 M solution precipitates out all of the Cl-. What are the masses of NaCl and KCl in the mixture? Atomic masses: g: Mass of NaCl g: Mass of KCL Ag = 107.868 g mol- 1 Cl = 35.453 g mol- 1 K = 39.098 g mol- N = 14.007 g mol−1 Na = 22.99 g mol−1 0 = 15.999 g mol 1 Question Help: ✓ Message instructor Submit Questionarrow_forwardPart 1. Draw monomer units of the following products and draw their reaction mechanism (with arrow pushing) Polyester fiber Using a) pthalic anhydride + anhydrous sodium acetate + ethylene glycol B)pthalic anhydride + anhydrous sodium acetate + glycerolarrow_forward
- Identify the missing starting materials/ reagents/ products in the following reactions. Show the stereochemistry clearly in the structures, if any. If there is a major product, draw the structures of the major product with stereochemistry clearly indicated where applicable. Show only the diastereomers (you do not have to draw the pairs of enantiomers). If you believe that multiple products are formed in approximately equal amounts (hence neither is the major product), draw the structures of the products, and show the detailed mechanism of these reactions to justify the formation of the multiple products. If you believe no product is formed, explain why briefly. (6 mark for each, except f and g, which are 10 mark each)arrow_forward3. What starting material would you use to synthesize 3-hydroxypentanoic acid using a NaBH4 reduction?arrow_forward1. Give stereochemical (Fischer projection) formulas for all (but no extras) the stereoisomers that could theoretically form during the reduction of a. the carbonyl group of 2-methyl-3--pentanone b. both carbonyl groups of 2,4-pentanedione (careful!) 2. Predict the products of the reduction of O=CCH2CH2CH2C=O with a. LiAlH4 b. NaBH4 CH3 OHarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning


