Question
With respect to the conformers of ethane, which of the following statements is true?
A.
Bond angle remains same but bond length changes
B.
Bond angle changes but bond length remains same
C.
Both bond angle and bond length change
D.
Both bond angles and bond length remain same
Answer :
Both bond angles and bond length remain same
Solution :
Isomers which are possible by rotation about single bonds without cleavage of any bond are called conformers. In ethane, an infinite number of conformations are possible. There are two extreme forms, the staggered conformation, which is the most stable and the eclipsed conformation which is least stable. Among the conformers of ethane, bond angle and bond length remains same while their energy, stability and dihedral angle are different.