Twistane (IUPAC name: tricyclo[4.4.0.03,8]decane[2]) is an organic compound with the formula C10H16.

Twistane was named for the way its rings are permanently forced into the cyclohexane conformation known as the "twist-boat".

[4] A 1967 publication concerned an intramolecular aldol condensation of a cis-decalin diketone.

[6] [dubious – discuss] The only symmetry operation in twistane is rotation, and there exist three 2-fold axes as shown in the left picture.

[7] Polytwistane is a hypothetical polymer of fused twistane units awaiting actual synthesis.