(N-Phenylthiourea-κS)bis(triphenylphosphane-κP)silver(I) nitrate

In the title salt, [Ag(C7H8N2S)(C18H15P)2]NO3, the coordination geometry about the AgI atom is shallow trigonal pyramidal, with the metal atom displaced by 0.372 (1) Å from the plane of the P and S atoms. In the crystal, the cations are linked to the anions by N—H⋯O hydrogen bonds, generating tetramers (two cations and two anions), which feature R 2 2(8) and R 4 4(8) loops. The cations are linked by weak C—H⋯π interactions, generating a three-dimensional network.

In the title salt, [Ag(C 7 H 8 N 2 S)(C 18 H 15 P) 2 ]NO 3 , the coordination geometry about the Ag I atom is shallow trigonal pyramidal, with the metal atom displaced by 0.372 (1) Å from the plane of the P and S atoms. In the crystal, the cations are linked to the anions by N-HÁ Á ÁO hydrogen bonds, generating tetramers (two cations and two anions), which feature R 2 2 (8) and R 4 4 (8) loops. The cations are linked by weak C-HÁ Á Á interactions, generating a three-dimensional network.

Structural commentary
Unlike the previous complex mentioned above (Nimthong et al., 2008), this complex is an ionic complex and it crystallizes in monoclinic system space group P2 1 /c. The structure consists of the discrete mononuclear [Ag(ptu) (PPh 3 ) 2 ] + cation and the NO 3anion which is similar to those [Ag(PPh 3 ) 2 (pymtH)]NO 3 (Aslanidis et al., 1997). A perspective view of the molecular structure of [Ag(ptu)(PPh 3 ) 2 ]NO 3 with atomic labeling is given in Figure 1. The cation part contains silver(I) atom trigonally coordinated by two phosphorus atoms from two triphenylphosphane molecules and one sulfur atom from N-phenylthiourea molecule similar to found in those silver oxyanion complexes containing mixed PPh 3 /heterocyclic thione ligands (Aslanidis et al., 1997;Ghassemzadeh et al., 2004) et al., 1997;Ghassemzadeh et al., 2004 ). The P(1)-Ag-P(2), P(1)-Ag-S(1) and P(2)-Ag-S(1) bond angles are 127.55 (1)° ,113.02 (1)° and 112.69 (1)°, respectively. Due to the steric crowding of six phenyl rings from two bulky triphenyl phosphane ligands and the π(CH)···Ag interaction [3.314 Å] between the centriod of phenyl ring (C2-C7) of the Nphenylthiourea and metal atom, the silver centre atom deviates from idealized trigonal planar with this atom lying ca 0.372 (1) Å out of the P 2 S plane. For the anion, although the oxygen atoms of the nitrate have no influence on coordination, they have great influence on the crystal packing of the complex. It is nearly planar with the bond angles around the nitrogen atom ranging from 119.01 (1)-120.53 (1)° and N(3)-O bond distances are 1.231 (2) -1.264 (2) Å.

Synthesis and crystallization
The mixture silver(I) nitrate and triphenylphosphane in ethanol was refluxed at the temperature ca 60-70 °C for 2 h. After that, N-phenylthiourea ligand was added to the clear mixture solution and then continued to reflux futher for 3 h. The clear filtration was kept and left to evaporate slowly at ambient temperature. After several days, colorless blocks were

Refinement
Crystal data, data collection and structure refinement details are summarized in Table 1   The hydrogen bonding interactions of [Ag(ptu)(PPh 3 ) 2 ]NO 3 complex (#i:

Figure 3
The cyclic of hydrogen bonding interactions containing two R 2 2 (8) and one R 4 4 (8).  The three-dimensional supramolecular interactions in crystal packing.