UPSC Exam > UPSC Questions > Appropriate H NMR chemical shifts (8) for the...
Start Learning for Free
Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are
[NET Dec 2011]
(d) A-5.7, B-6.8, C-2.1, D-3.9 ppm?
[NET Dec 2011]
(d) A-5.7, B-6.8, C-2.1, D-3.9 ppm?
Most Upvoted Answer
Appropriate H NMR chemical shifts (8) for the protons A-D for the foll...
Explanation:
Chemical Shifts:
- Proton A: 5.7 ppm
- Proton B: 6.8 ppm
- Proton C: 2.1 ppm
- Proton D: 3.9 ppm
Interpreting Chemical Shifts:
- The chemical shift of a proton in NMR spectroscopy is influenced by its chemical environment.
- Electronegative atoms or functional groups nearby can deshield the protons, causing them to resonate at higher chemical shifts (upfield).
- Conversely, electron-donating groups can shield the protons, leading to lower chemical shifts (downfield).
Assignment of Protons:
- Proton A at 5.7 ppm suggests it is likely in a region influenced by an electron-withdrawing group or an unsaturated system.
- Proton B at 6.8 ppm indicates it is in a more deshielded environment compared to Proton A.
- Proton C at 2.1 ppm is in a relatively shielded region, possibly near electron-donating groups.
- Proton D at 3.9 ppm falls between Protons C and B, indicating its position in the molecule.
Conclusion:
- The chemical shifts provided align with the expected trends based on the chemical environment of the protons.
- Analyzing the chemical shifts can provide valuable insights into the structure and connectivity of the compound.
Chemical Shifts:
- Proton A: 5.7 ppm
- Proton B: 6.8 ppm
- Proton C: 2.1 ppm
- Proton D: 3.9 ppm
Interpreting Chemical Shifts:
- The chemical shift of a proton in NMR spectroscopy is influenced by its chemical environment.
- Electronegative atoms or functional groups nearby can deshield the protons, causing them to resonate at higher chemical shifts (upfield).
- Conversely, electron-donating groups can shield the protons, leading to lower chemical shifts (downfield).
Assignment of Protons:
- Proton A at 5.7 ppm suggests it is likely in a region influenced by an electron-withdrawing group or an unsaturated system.
- Proton B at 6.8 ppm indicates it is in a more deshielded environment compared to Proton A.
- Proton C at 2.1 ppm is in a relatively shielded region, possibly near electron-donating groups.
- Proton D at 3.9 ppm falls between Protons C and B, indicating its position in the molecule.
Conclusion:
- The chemical shifts provided align with the expected trends based on the chemical environment of the protons.
- Analyzing the chemical shifts can provide valuable insights into the structure and connectivity of the compound.
|
Explore Courses for UPSC exam
|
|
Similar UPSC Doubts
Top Courses for UPSCView all
Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm?
Question Description
Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm?.
Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm?.
Solutions for Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? in English & in Hindi are available as part of our courses for UPSC.
Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
Here you can find the meaning of Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? defined & explained in the simplest way possible. Besides giving the explanation of
Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm?, a detailed solution for Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? has been provided alongside types of Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? theory, EduRev gives you an
ample number of questions to practice Appropriate H NMR chemical shifts (8) for the protons A-D for the following compound are[NET Dec 2011](d) A-5.7, B-6.8, C-2.1, D-3.9 ppm? tests, examples and also practice UPSC tests.
|
|
Explore Courses for UPSC exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup