Question

What is the IUPAC name of the simplest bicyclo compound?

• A. Bicyclo[1,1,0]butane
• B. bis - Cyclopropane
• C. Bicyclo[1,1,0]pentane
• D. di-Cyclopropane

Answer 1

The correct option is A

Bicyclo[1,1,0]butane

The simplest bicyclo compound is

It is numbered as follows:

The numbering starts at the bridgehead and proceeds to number the ring containing higher carbon

atoms $\left(\frac{excludingthebridge}{commoncarbonatoms}\right)$

The compound has a total of 4 carbon atoms. Hence it is named as butane. To name the compound, we

use the bicyclo prefix. The IUPAC name is

Bicyclo[1,1,0]butane