The title compound, [Au(C(9)H(10)NOS)(C(18)H(33)P)], represents a monoclinic polymorph to complement a previously reported triclinic (P) polymorph [Hall et al. (1993 ▶). Aust. J. Chem.46, 561-570 (unit-cell data only)]. The Au(I) atom is coordinated within an S,P-donor set that defines a slightly distorted linear geometry [S-Au-P = = 175.43 (3)°], with the distortion due in part to a close intra-molecular Au⋯O contact [3.036 (2) Å]. In the crystal structure, mol-ecules are arranged into supra-molecular chains along the b axis mediated by C-H⋯π inter-actions.
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