Practice Questions
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In a conformational energy diagram for cyclohexane, which of the following conformations corresponds to the highest potential energy due to steric strain?
The boat shape places many hydrogens close together, causing torsional and steric strain. Other options are incorrect because The chair shape has almo...
In a cyclobutane molecule, which conformation is expected to exhibit the least torsional strain?
Staggered means each hydrogen points away from its neighbors, so bonds are not twisted together. Other options are incorrect because The chair‑like sh...
In a molecule of 1-methylcyclohexane, which conformation minimizes steric hindrance and torsional strain while maximizing stability after a ring flip?
When the methyl group is on the equatorial side, it stays farther away from the ring hydrogen atoms. Other options are incorrect because A boat shape ...
When considering the ring flipping of 1,2-dimethylcyclohexane, what effect does this process have on the interactions of axial and equatorial substituents as represented in a conformational energy diagram?
Axial groups sit above and below the ring and bump into other axial hydrogens a short distance away. Other options are incorrect because Equatorial gr...
In a substituted cyclohexane, how does the axial position of a bulky substituent influence angle strain and overall stability compared to when it is in the equatorial position?
An axial substituent sits directly above or below the ring, forcing bonds to bend toward the center. Other options are incorrect because Many think ax...
Chair conformation : Stability :: Boat conformation : ?
A boat shape pushes atoms close together, creates twisting, and keeps bonds at bad angles. Other options are incorrect because People see that the boa...
Which of the following statements about cycloalkane conformations are true? Select all that apply.
The chair form has no eclipsed bonds, so it has lower torsional strain. Other options are incorrect because Cyclopentane is not flat; a planar ring wo...
Arrange the following conformational changes of cyclohexane from least to most stable: A. Chair conformation, B. Twist-boat conformation, C. Boat conformation, D. Half-chair conformation.
The chair shape has the most even angles and no eclipsing interactions, so it is the lowest in energy. Other options are incorrect because This option...
Which of the following cycloalkane conformations is characterized by minimal angle strain and torsional strain, making it the most stable form?
The chair shape keeps bond angles close to the ideal 109.5° and keeps hydrogens out of line with each other, so it has almost no torsional strain. Oth...
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