Intramolecular stacking of the (4-chloro-2,2':6',2"-terpyridine)platinum(II
) moieties occurs in N,S-bis[(4'-chloro-2,2':6,2-terpyridine) platinum(II)]
-2-mercaptoimidazole tris-hexafluorophosphate; N,S-bis[(2,2':6',2"-terpyrid
ine)-platinum(II)]thioacetimine trinitrate is slowly transformed in aqueous
solution to the molecular propeller-like tris[(2,2':6',2"-terpyridine)plat
inum(II)] sulfonium ion.