how do I to draw cyclopropane of bond rotation?

We can't draw diagrams on this forum. You might be able to find it on the web.

To draw the cyclopropane structure showing bond rotation, follow these steps:

1. Start by drawing a triangle to represent the cyclopropane ring. Since cyclopropane is a three-membered ring, it will have three carbon atoms connected by single bonds.

2. Add the hydrogen atoms to each carbon. Each carbon atom should have one hydrogen attached to it.

3. To depict bond rotation, draw curved arrows connecting the carbon atoms at the corners of the triangle. These curved arrows represent the freedom of rotation around the carbon-carbon single bonds in cyclopropane.

4. Label the atoms and connect them with single bonds. Make sure to maintain the triangular shape.

5. Lastly, indicate the bond rotation by drawing dashed lines along the curved arrows connecting the carbon atoms. These dashed lines represent the potential for bond rotation, as the carbon-carbon single bonds in cyclopropane can freely rotate.

By following these steps, you can accurately draw the cyclopropane structure while showing its bond rotation.