COMEDK2025ChemistryGeneral Organic ChemistryActual
Choose the incorrect statement from the following.
Options
- AStaggered conformation of ethane is more stable than the eclipsed conformation.
- BThe energy difference between the staggered and eclipsed conformation of ethane is 12.55 ~kJ / mol
- CA 90^ rotation converts staggered conformation of ethane into eclipsed conformation.
- DThe distance between non-bonded H-atoms of ethane in eclipsed conformation is 2.29 Å
Correct answer
C. A 90^ rotation converts staggered conformation of ethane into eclipsed conformation.
Step-by-step solution
In the ethane molecule, the staggered conformation is more stable than the eclipsed conformation due to lower torsional strain. This is a correct statement. The energy difference between the staggered and eclipsed conformations of ethane is approximately 12.55 kJ/mol ( 3.0 kcal/mol ), which is a correct statement. The dihedral angle between the C-H bonds of adjacent carbon atoms in the staggered conformation is 60^ . A rotation of 60^ about the C-C bond converts the staggered conformation into the eclipsed conforma