Both s-cis and s-trans conformers of 1,3-butadiene have a continuous conjugated π system, which of the following statements is true about the s-cis conformer?

The s-cis conformer is lower in energy than the s-trans conformer
The s-cis conformer is higher in energy than the s-trans conformer.
The s-cis conformer has equal energy as the s-trans conformer.
None of these.

second option (B)

Explanation:

The s-cis conformer is higher in energy than the s-trans conformer. The most stable conformer has bent-inward geometry which favors the π bond interaction with methyl/methylene hydrogen/carbon atom hence more crowding with consequent higher energy, this is also responsible for the higher boiling point of the s-cis conformer.

i believe it is c.) 1575 j.

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa