Engineering
Chemistry
Geometrical Isomerism
Conformational Isomerism
Alkane
Question

Which of the following is correct?

cis-cycloalkane is always more stable than trans cycloalkane.

does not show any type of isomerism

show geometrical isomerism.

does not show geometrical isomerism

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Solution
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Geometrical isomerism occurs in alkenes and cyclic compounds when rotation around a bond is restricted and two different groups are attached to each carbon. For cycloalkanes, trans isomers are more stable than cis in larger rings (e.g., cyclodecane) due to reduced steric strain, but cis is more stable in small rings like cyclopropane. The molecule C6H5-CH=CH-C6H5 has identical phenyl groups on both carbons of the double bond, so it does not exhibit geometrical isomerism.

Final Answer: C6H5-CH=CH-C6H5 does not show geometrical isomerism.