Chapter 2 - Conformations of Alkanes and Cycloalkanes 

Structural formulae

________ are useful for demonstrating atom connection in a molecule.

Collisions

________ and thermal movements cause the strained and relaxed structures to interconvert.

normal temperature

At ________, ethane molecules collide with enough energy to pass the energy barrier between extreme conformations, and rotation about the carbon- carbon single bond from one conformation to another happens quickly.

carbon carbon

There are an unlimited number of ethane conformations that differ only in the degree of rotation about the ________ single bond.

bicycloalkane

A(n) ________ has the generic formula CnH2n22.

physical entities

Chemicals, like every macroscopic object, are ________ with optimum structures.

Cyclopropane

________ and its derivatives undergo various ring- opening processes not found in bigger cycloalkanes due to their severe intramolecular strain.

Rotation

________ is not totally free since there is a minor energy barrier between conformations.

bent branch

A(n) ________ has more energy than an undisturbed branch, and that energy is released as it relaxes between wind gusts.

term Strain

The ________ is a fundamental term in organic chemistry, and is a measure of the energy stored in a chemical as a result of structural deformation.