Chemistry Exam > Chemistry Questions > The gauche conformation (θ = 60o) of n-b...
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The gauche conformation (θ = 60o) of n-butane possess:
- a)Plane of symmetry; and is achiral
- b)C2-axis of symmetry; and is chiral
- c)Centre of symmetry; and is achiral
- d)Plane of symmetry; and chiral
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The gauche conformation (θ = 60o) of n-butane possess:a)Plane of ...
Explanation:
The gauche conformation of n-butane has two staggered conformations where the two methyl groups are oriented in the anti position and gauche position. In the gauche conformation, the dihedral angle between the C-C bond and the C-H bond is 60 degrees.
Chirality and Symmetry:
Chirality refers to the property of a molecule that is not superimposable on its mirror image. Symmetry refers to the property of a molecule that has an element of symmetry, such as a plane of symmetry, axis of symmetry, or center of symmetry.
Plane of Symmetry:
A plane of symmetry is a plane that divides a molecule into two identical halves. If a molecule has a plane of symmetry, it is achiral (not chiral) because it can be superimposed on its mirror image.
C2-Axis of Symmetry:
A C2-axis of symmetry is a rotation axis that rotates a molecule 180 degrees and leaves it unchanged. If a molecule has a C2-axis of symmetry, it is achiral (not chiral) because it can be superimposed on its mirror image.
Centre of Symmetry:
A center of symmetry is a point in a molecule that is equidistant from two or more atoms or groups of atoms. If a molecule has a center of symmetry, it is achiral (not chiral) because it can be superimposed on its mirror image.
Conclusion:
The gauche conformation of n-butane has a C2-axis of symmetry because it can be rotated 180 degrees about the C2-C3 bond and remain unchanged. However, it is not achiral because it does not possess a plane of symmetry or a center of symmetry. Therefore, the correct answer is option B.
The gauche conformation of n-butane has two staggered conformations where the two methyl groups are oriented in the anti position and gauche position. In the gauche conformation, the dihedral angle between the C-C bond and the C-H bond is 60 degrees.
Chirality and Symmetry:
Chirality refers to the property of a molecule that is not superimposable on its mirror image. Symmetry refers to the property of a molecule that has an element of symmetry, such as a plane of symmetry, axis of symmetry, or center of symmetry.
Plane of Symmetry:
A plane of symmetry is a plane that divides a molecule into two identical halves. If a molecule has a plane of symmetry, it is achiral (not chiral) because it can be superimposed on its mirror image.
C2-Axis of Symmetry:
A C2-axis of symmetry is a rotation axis that rotates a molecule 180 degrees and leaves it unchanged. If a molecule has a C2-axis of symmetry, it is achiral (not chiral) because it can be superimposed on its mirror image.
Centre of Symmetry:
A center of symmetry is a point in a molecule that is equidistant from two or more atoms or groups of atoms. If a molecule has a center of symmetry, it is achiral (not chiral) because it can be superimposed on its mirror image.
Conclusion:
The gauche conformation of n-butane has a C2-axis of symmetry because it can be rotated 180 degrees about the C2-C3 bond and remain unchanged. However, it is not achiral because it does not possess a plane of symmetry or a center of symmetry. Therefore, the correct answer is option B.
Community Answer
The gauche conformation (θ = 60o) of n-butane possess:a)Plane of ...
I think ans will be a)part because N butane will not be optically active in any conformer.
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The gauche conformation (θ = 60o) of n-butane possess:a)Plane of symmetry; and is achiralb)C2-axis of symmetry; and is chiralc)Centre of symmetry; and is achirald)Plane of symmetry; and chiralCorrect answer is option 'B'. Can you explain this answer?
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The gauche conformation (θ = 60o) of n-butane possess:a)Plane of symmetry; and is achiralb)C2-axis of symmetry; and is chiralc)Centre of symmetry; and is achirald)Plane of symmetry; and chiralCorrect answer is option 'B'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about The gauche conformation (θ = 60o) of n-butane possess:a)Plane of symmetry; and is achiralb)C2-axis of symmetry; and is chiralc)Centre of symmetry; and is achirald)Plane of symmetry; and chiralCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The gauche conformation (θ = 60o) of n-butane possess:a)Plane of symmetry; and is achiralb)C2-axis of symmetry; and is chiralc)Centre of symmetry; and is achirald)Plane of symmetry; and chiralCorrect answer is option 'B'. Can you explain this answer?.
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