The dimer, trimer and 1,2,4‐trithiolane of adamantanethione

The molecules of dispiro[1,3‐dithietane‐2,2′:4,2′′‐diadamantane], C 20 H 28 S 2 , have crystallographic C i symmetry, as well as local D 2 h symmetry, and a planar 1,3‐dithietane ring. The molecules of trispiro[1,3,5‐trithiane‐2,2′:4,2′′:6,2′′′‐triadamantane], C 30 H 42 S 3 , have approximate C 2 symmetry and the 1,3,5‐trithiane ring has a twist–boat conformation. The C—S—C bond angles within the ring are about 8° larger than observed in most related 1,3,5‐trithiane structures. In dispiro[1,2,4‐trithiolane‐3,2′:5,2′′‐diadamantane], C 20 H 28 S 3 , the molecules have local C 2 symmetry and the 1,2,4‐trithiolane ring has a half‐chair conformation.