(1-Acetylthiourea-κS)bromidobis(triphenylphosphane-κP)silver(I)

In the title complex, [AgBr(C3H6N2OS)(C18H15P)2], the AgI ion is in a distorted tetrahedral geometry coordinated by two P atoms from two triphenylphosphane ligands, one S atom of an acetylthiourea ligand and one bromide ligand. There are intramolecular N—H⋯Br and N—H⋯O hydrogen bonds present. In the crystal, pairs of N—H⋯S hydrogen bonds involving thiourea groups form inversion dimers. In addition, moleclues pack to give sixfold phenyl embraces with an intermolecular P⋯P distance of 6.4586 (17) Å.

In the title complex, [AgBr(C 3 H 6 N 2 OS)(C 18 H 15 P) 2 ], the Ag I ion is in a distorted tetrahedral geometry coordinated by two P atoms from two triphenylphosphane ligands, one S atom of an acetylthiourea ligand and one bromide ligand. There are intramolecular N-HÁ Á ÁBr and N-HÁ Á ÁO hydrogen bonds present. In the crystal, pairs of N-HÁ Á ÁS hydrogen bonds involving thiourea groups form inversion dimers. In addition, moleclues pack to give sixfold phenyl embraces with an intermolecular PÁ Á ÁP distance of 6.4586 (17) Å .

Related literature
For the definition of sixfold phenyl embraces, see: Dance & Scudder(2000). For the synthesis and structure of silver(I) coordination compounds and their potential applications, see:

Comment
The studies of silver(I) complexes with tertiary phosphane and sulfur donor ligands as co-ligainds has progressed extensively in recent years (Lobana et al., 2008;Nawaz et al., 2011) because of their potential applications such as antimicrobial activities (Isab et al., 2010) and they also often show interesting luminescence properties (Ferrari et al., 2007). Moreover, sixfold phenyl embraces (6PE), a common motif of the six phenyl groups of two adjacent triphenylphosphane (PPh 3 ) ligands have been also widely studied, where six phenyl rings in the interaction zone participate in a concerted cycle of edge-to-face (ef) phenyl···phenyl interactions (Dance et al., 2000).

Experimental
Triphenylphosphane (0.28 g, 1.00 mmol) was dissolved in 30 cm 3 of mixed sovents of acetonitrile and methanol at 343-348 K and then AgBr (0.10 g, 0.50 mmol) was added. The mixture was stirred for 2 h during that time a greenish precipitate was formed. Acetylthiourea (0.13 g, 1.00 mmol) was added and the new reaction mixture was heated under reflux for 5 h where upon the precipitate gradually disappeared. The resulting clear solution was filtered off and left to evaporate at room temperature. The crystalline solids, which were deposited upon standing for several days, were filtered off and dried in vacuo. Analysis found: C 57.58, H 4.09, N 3.27, S 2.37%; calculated for C39H32AgBrN2OP2S: C 56.40, H 4.37, N 3.37, S 3.86%.

Refinement
The H atoms bonded to C atoms were constrained with a riding model of 0.93 Å (aryl H), and U iso (H) = 1.2U eq (C); 0.96 Å(CH 3 ) and U iso (H) = 1.5U eq (C). All H atom bonded to the N atom was located in a difference Fourier map and refined isotropically.

Figure 1
The molecular structure with displacement ellipsoids drawn at the 50% probability level.

Special details
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'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 > σ(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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x  (17