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A trans-cyclooctene "ring" (pun intended)! trans-Cyclooctene is the smallest cycloalkene in which the trans-isomer is stable at room temperature. Smaller trans-cycloalkenes are unstable due to severe angle strain. Due to its molecular structure and the fact that the chain cannot cross the double bond to the other side, trans-cyclooctene is chiral and cannot interconvert with its mirror image. Since the ring needs to be perfectly circular in its inner cross section, some accuracy is sacrificed but I tried to make it as close to scale as possible. One angstrom is approx. 5.7 mm in this model. The double bond and the two hydrogen atoms attached are shown. All other carbons have their hydrogens omitted for aesthetic and practical reasons.