JEE Main202427 Jan 2024Evening ShiftChemistryGeneral Organic ChemistryActual
The incorrect statement regarding conformations of ethane is:
Options
- AEthane has infinite number of conformations
- BThe dihedral angle in staggered conformation is 60 °
- CEclipsed conformation is the most stable conformation.
- DThe conformations of ethane are interconvertible to one-another
Correct answer
C. Eclipsed conformation is the most stable conformation.
Step-by-step solution
In staggered conformation arrangement, the hydrogens of the two carbon atoms are staggered with respect to one another. As a result, they are at maximum distance apart and have minimum repulsion between the hydrogen atoms attached to the two carbon atoms. In eclipsed conformation, the hydrogens of one carbon atom are directly behind those of the other. Consequently, the repulsion in between these hydrogen atoms is maximum. Therefore, staggered conformation of ethane is more stable than eclipsed conformation. Eclips