Bonds are located above or below and perpendicular to the plane of the chair conformation of cyclohexane. results in an increase in the number of c-z bonds, where z is an element that is more electronegative than carbon (usually o, n, or x). strain is an increase in energy cause by eclipsing interactions. results in an increase in the number of c-h bonds. are isomers that differ only in the way the atoms are oriented in space.