21. The smallest cycloalkane family is the three-membered cyclopropane ( ( CH 2 ) 3 ). 22. Cyclopropane and propene have the same molecular formula but have different structures, making them structural isomers.23. These reactions are differentiated in terms of how the carbon is added to form the cyclopropane ring. 24. With certain allyl alcohols, the alcohol group is replaced by nucleophilic carbon forming a cyclopropane ring: 25. Some cycloadditions instead of ? bonds operate through strained cyclopropane rings; as these have significant ? character. 26. The compound is also used as a catalyst for the preparation of certain cyclopropanes in the Kulinkovich reaction. 27. Another modification of C-3'with cyclopropane and epoxide moieties were also found to be potent. 28. In addition, the ring structures of cyclopropanes / enes and cyclclobutanes / enes offer very little conformational flexibility. 29. Rings smaller than cyclohexane, like cyclopropane and cyclobutane, have significant tension caused by large-angle strain. 30. Ring sizes from cyclopropane through cyclooctane are able to undergo Tiffeneau Demjanov ring expansion with some degree of success.
