Thiepane (also hexathiophane[1]) is the organosulfur compound with the formula (CH2)6S.

Thiepanes are seven-membered ring heterocycles that contains sulfide.

[3] A naturally occurring derivative is lenthionine, 1,4-(CH2)2S5.

Thiepane itself may be a product of spontaneous coal fires in post-mining waste heaps.

[1] This article about a heterocyclic compound is a stub.