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Which of the following is not a priority rule for R, S-Configuration?
- a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priority
- b)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are compared
- c)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicated
- d)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priority
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following is not a priority rule for R, S-Configuration?a...
To determine the priority of substituents in R, S-configuration, the Cahn-Ingold-Prelog priority rules are used. These rules help assign priority to the atoms or groups attached to a chiral center based on their atomic numbers.
The correct priority rules for R, S-configuration are:
A: If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priority.
The correct priority rules for R, S-configuration are:
A: If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priority.
- This rule is correct as it follows the Cahn-Ingold-Prelog priority rules.
B: If the two atoms attached to the chiral center are the same, the atoms attached to each of these first atoms are compared.
- This rule is correct as it accounts for situations where the directly attached atoms are the same.
C: When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicated.
- This rule is correct as it recognizes the presence of multiple bonds and treats them as equivalent to duplicated or triplicated atoms.
D: If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priority.
- This rule is incorrect. The correct rule is that the atom of higher atomic number gets higher priority, not lower priority.
Therefore, the correct answer is D: If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priority.
Most Upvoted Answer
Which of the following is not a priority rule for R, S-Configuration?a...
Explanation:
Priority Rules for R, S-Configuration:
- When assigning R, S configuration to chiral centers, the following priority rules are followed:
a) If the four atoms attached to the chiral center are all different:
- Priority depends on atomic number, with the atom of lower atomic numbers getting lower priority.
b) If the two atoms attached to the chiral center are the same:
- The atoms attached to each of these first atoms are compared to determine priority.
c) Double bond or triple bond:
- When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicated for the purpose of assigning priority.
Explanation of Option D:
- Option D states, "If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priority."
- This statement is incorrect as the correct rule is that the atom of lower atomic number gets lower priority when all four atoms attached to the chiral center are different.
- Therefore, option D is not a priority rule for R, S-configuration.
Priority Rules for R, S-Configuration:
- When assigning R, S configuration to chiral centers, the following priority rules are followed:
a) If the four atoms attached to the chiral center are all different:
- Priority depends on atomic number, with the atom of lower atomic numbers getting lower priority.
b) If the two atoms attached to the chiral center are the same:
- The atoms attached to each of these first atoms are compared to determine priority.
c) Double bond or triple bond:
- When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicated for the purpose of assigning priority.
Explanation of Option D:
- Option D states, "If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priority."
- This statement is incorrect as the correct rule is that the atom of lower atomic number gets lower priority when all four atoms attached to the chiral center are different.
- Therefore, option D is not a priority rule for R, S-configuration.
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Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer?
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Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer?.
Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for UGC NET.
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Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following is not a priority rule for R, S-Configuration?a)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priorityb)If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are comparedc)When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicatedd)If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priorityCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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