The title compound, [Ir(C5H4NOS)(C8H12)], contains an Ir atom in an ap
proximately square-planar environment if we consider the coordination
plane formed by the midpoints of the double bonds of the cyclooctadien
e ligand together with the S and O atoms [deviation from least-squares
plane is 0.01 (5)Angstrom]. The S,O-ligand is also planar and the fiv
e-membered chelate ring has a bite angle of 84.4 (3)degrees at the Ir
atom. Bond distances are Ir-S = 2.270 (4), Ir-O = 2.031 (9) and averag
e Ir-C(olefinic) = 2.11 (2)Angstrom.