Question

Consider the conformational analysis of alkanes. In different alkanes
it is observed that, different energy levels are taken in consideration
for analysis e.g. ethane has two energy levels. One for eclipsed and
other for staggered. In which of the following only two energy levels
(Only one maxima and minima) are observed during conformational
changes along the indicated C-atoms?
a)Propane (C1-C2)
b)Pentane (C2-C3)
c)Butane (C2-C3)
d)Hexane (C2-C3)​

Answer 1

Answer:

option c

Explanation:

option c is right answer

Answer 2

c)Butane (C2-C3) is the correct option

Expalnation:

1.Conformational analysis is the study of the different energy levels associated with the different conformations of a molecule.

2.Conformations are the different 3-dimensional arrangements that the molecule can acquire by freely rotating around σ-bonds. One must keep in mind that conformations are not isomers.

3.Conformational analysis is an important step in molecular modeling as it is necessary to reduce time spent in screening of compounds for activity.

4.Most drugs are flexible molecules with the ability to adopt different conformations by means of rotation about single bonds