Concept explainers
(a)
Interpretation:
Which underlined proton has the greater chemical shift has to be determined.
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.
(b)
Interpretation:
Which underlined proton has the greater chemical shift has to be determined.
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.
(c)
Interpretation:
Which underlined proton has the greater chemical shift has to be determined.
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.
(d)
Interpretation:
Which underlined proton has the greater chemical shift has to be determined.
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.
(e)
Interpretation:
Which underlined proton has the greater chemical shift has to be determined.
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.
(f)
Interpretation:
Which underlined proton has the greater chemical shift has to be determined.
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.
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
Organic Chemistry (8th Edition)
- Isoamyl acetate is the primary component of artificial banana flavor. Which signals will be in the positive phase, negative phase, or nonexistent in normal 13C NMR, DEPT-90, and DEPT-135 of isoamyl acetate?arrow_forward4b Which carbon signal for the compound will appear at highest chemical shift. Why?arrow_forwardThe chemical environment of protons can be deduced from their chemical shifts. What are the relative chemical shifts of the protons at the labeled positions? [Protons that are highly shielded have low delta (chemical shift) values.] 1) b C The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is 2) она The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is Submit Answer Retry Entire Group 3 more group attempts remainingarrow_forward
- Match the chemical shifts with the letter of the absorbing protons 4.0 = 2.3 = 1.6 = 1.1 = 0.95 = A/ N A/arrow_forwardHow many peaks can you identify from the NMR spectrum? To which does each chemical shift peak corresponds?arrow_forwardThe chemical environment of protons can be deduced from their chemical shifts. What are the relative chemical shifts of the protons at the labeled positions? [Protons that are highly shielded have low delta (chemical shift) values.] 1) a HO- The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is 2) b The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) isarrow_forward
- In this structure, which hydrogen has the higher chemical shift and why?arrow_forwardA 300-MHz spectrometer records a proton that absorbs at a frequency 2130 Hz downfield(deshielded) from TMS.(a) Determine its chemical shiftarrow_forwardReview Topica) (References) The chemical environment of protons can be deduced from their chemical shifts. What are the relative chemical shifts of the protons at the labeled positions? [Protons that are highly shielded have low delta (chemical shift) values.] 1) The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is 2) The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is Retry Entire Group 1 more group attempt remaining Submit Answerarrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning