Question

The most contributing factor in the destabilization of half chair is
A
Angle and torsional strain
B
Flag pole hydrogens
с
Repulsions between C1 and C4 hydrogen
Staggered conformation​

Answer 1

Explanation:

don't know sorry good night

Answer 2

Half chair structures are destabilized by (a) Angle and Torsional strain.

Explanation:

• Full chair structures are chemical conformations of compounds where the cyclohexane structures are positioned in such a way that three carbon atoms are staggered upwards and other three are staggered downwards. These are highly stable and lack torsional strain.
• Whereas the half chair structures are twisted full-chair structures, having 5 carbon atoms on the same plane and the other one is on the opposite side, this creates high angular strain. The  Carbon-Hydrogen bonds are fully eclipsed on the plane, thereby creating torsional strain.
• The carbon on the other plane prevents the  carbon-hydrogen bonds from inverting.

• These are unstable confrontations which keep switching regularly.
• (A) angle and torsional strain are the factors which destabilize a half chair structure.