[(Z)-Isopropoxy(4-nitrophenylimino)methanethiolato-κS](tricyclo-hexyl-phosphine-κP)gold(I).

In the title compound, [Au(C(10)H(11)N(2)O(3)S)(C(18)H(33)P)], the gold(I) atom is linearly coordinated within a SP donor set. The distortion from linearity [S-Au-P = 177.54 (3)°] can be traced to an intra-molecular Au⋯O contact of 3.009 (3) Å. In the crystal, layers of mol-ecules are stabilized by a combination of C-H⋯O and C-H⋯π inter-actions.

In the title compound, [Au(C 10 H 11 N 2 O 3 S)(C 18 H 33 P)], the gold(I) atom is linearly coordinated within a SP donor set. The distortion from linearity [S-Au-P = 177.54 (3) ] can be traced to an intramolecular AuÁ Á ÁO contact of 3.009 (3) Å . In the crystal, layers of molecules are stabilized by a combination of C-HÁ Á ÁO and C-HÁ Á Á interactions.

Experimental
Crystal data [Au(C 10

S1. Comment
The structure of the title compound, (I), was determined as a part of an on-going study of the structural systematics, including luminescence properties of molecules related to the general formula R 3 PAu[SC(OR′)\d NR′′] for R, R′ and R′′ = alkyl and aryl (Ho et al. 2006;Ho & Tiekink, 2007;Kuan et al., 2008). The Au atoms in (I) exists in the expected linear geometry defined by S and P atoms (Au-S = 2.3116 (9) Å and Au-P = 2.2655 (9) Å), Fig. 1, with the deviation from the ideal 180° angle (S1-Au-P1 = 177.54 (3)°) being related to the close approach of the O1 atom, 3.009 (3) Å; this is the normally observed orientation of the carbonimidothioate anion when coordinated to phosphinegold(I) centres. The conformation about the C1N1 (1.275 (5) Å) is Z and the C1-S1 distance (1.739 (4) Å) indicates the ligand is functioning as a thiolate.
The formation of C-H···O and C-H···π interactions, Table 1, lead to supramolecular arrays in the ab plane, Fig. 2.
These stack to consolidate the crystal packing.

S3. Refinement
The H atoms were geometrically placed (C-H = 0.94-0.99 Å) and refined as riding with U iso (H) = 1.2U eq (C). The maximum and minimum residual electron density peaks of 1.33 and 1.04 e Å -3 , respectively, were located 0.89 Å and 1.35 Å from the Au atom.   Supramolecular layer formation in (I) mediated by C-H···O and C-H···π contacts (orange and purple dashed lines, respectively). Colour code: Au, orange; S, yellow; P, pink; O, red; N, blue; C, grey; and H, green.

[(Z)-Isopropoxy(4-nitrophenylimino)methanethiolato-κS](tricyclohexylphosphine-κP)gold(I)
Crystal data [Au(C 10 Special details Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes. Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > 2σ(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.