Stability of Cycloalkanes since carbon prefers to 120 have bond angles of ~109°，ring sizes other than five and six are highly strained (angle strain) 40 ■ Rings are strained due to bond bending distortions 34567891011121314 and steric interactions Ring size l09°(tetrahedral 19 *499 90 1089 Cyclopropane Cyclobutane Cyclopentane 2004 Thomson-Brooks/ColeStability of Cycloalkanes „ since carbon prefers to have bond angles of ~109°, ring sizes other than five and six are highly strained (angle strain ) „ Rings are strained due to bond bending distortions and steric interactions