[(Z)-N,O-Disopropylthiocarbamato-κS](tricyclohexylphosphine-κP)gold(I)

In the title compound, [Au(C7H14NOS)(C18H33P)], the AuI atom is coordinated within an S,P-donor set that defines a slightly distorted linear geometry [S—Au—P = 174.94 (2)°], with the distortion due to a short intramolecular Au⋯O contact [2.908 (2) Å].

In the title compound, [Au(C 7 H 14 NOS)(C 18 H 33 P)], the Au I atom is coordinated within an S,P-donor set that defines a slightly distorted linear geometry [S-Au-P = 174.94 (2) ], with the distortion due to a short intramolecular AuÁ Á ÁO contact [2.908 (2) Å ].

Experimental
Crystal data [Au(C 7

S1. Comment
As a part of an on-going study of the structural systematics of molecules related to the general formula R 3 PAu[SC(OR′)NR′′] for R, R′ and R′′ = alkyl and aryl (Ho et al. 2006;Ho & Tiekink, 2007;Kuan et al., 2008), the title compound, (I), was investigated.
In keeping with previous studies, the gold atom exists within an SP donor set defined by the phosphine-P and thiolate-S atoms, Table 1 and Fig. 1. Confirmation that the carbonimidothioate ligand is functioning as a thiolate is found in the magnitudes of the C1-S1 and C1═N1 distances of 1.767 (3) and 1.263 (3) Å, respectively. The coordination geometry is distorted from the ideal linear [S-Au-P = 174.94 (2) °] owing to the close approach of the O1 atom, 2.908 (2) Å.

S2. Experimental
Compound (I) was prepared following the standard literature procedure from the reaction of Cy 3 PAuCl and ( i Pr)OC(S)N(H)( i Pr) in the presence of base (Hall et al., 1993).

S3. Refinement
The H atoms were geometrically placed (C-H = 0.97-0.99 Å) and refined as riding with U iso (H) = 1.2-1.5U eq (C). The maximum and minimum residual electron density peaks of 1.01 and 0.78 e Å -3 , respectively, were located 0.92 Å and 0.83 Å from the Au atom.  Molecular structure of (I) showing displacement ellipsoids at the 50% probability level.

[(Z)-N,O-Disopropylthiocarbamato-κS](tricyclohexylphosphine-κP)gold(I)
Crystal data [Au(C 7 where P = (F o 2 + 2F c 2 )/3 (Δ/σ) max = 0.001 Δρ max = 1.01 e Å −3 Δρ min = −0.78 e Å −3 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.