Illustrated Glossary of Organic Chemistry

Cyclopropane: A cycloalkane of molecular formula C3H6, consisting of three methylene groups forming a ring. Cyclopropane has 27 kcal mol-1 of ring strain, due to steric strain (hydrogen-hydrogen eclipsing) and angle strain.

Molecular Structure of Cyclopropane

Kekule structure
Bond-line structure
Ball and spoke model
Space-filling model
Molecular model kit