"Slide 18: Cis, Trans Isomerism • trans-cyclooctene is the smallest trans cyclooctene that has been prepared in pure form and is stable at room temperature • the cis isomer is 38 kJ (9.1 kcal) / mol more stable than the trans isomer • the trans isomer is chiral even though it has no chiral center trans Cyclooctene (a pair of enantiomers) 5-18"