Question

write geometrical isomerism in oxims and alicyclic cycloalkane​

Answer 1

The geometrical isomerism arises when atoms or groups are arranged differently in space due to restricted rotation of a bond or bonds in a molecule.

E.g.

1) Two different spatial arrangements of methyl groups about a double bond in 2-butene give rise to the following geometrical isomers.

i.e., cis-2-butene and trans-2-butene

geometrical isomers of 2-butene

Above two forms are not inter convertible due to restricted rotation of double bond.

In the cis isomer, the two methyl groups are arranged on the same side of a double bond. Whereas in the trans isomer, they are on the opposite side.

2) There are two geometrical isomers (cis & trans) possible in case of 1,4–dimethylcyclohexane as shown below: