Synthesis and crystal structures of silver(I) halide complexes containing 1,3-diisopropyl-2-thiourea and triphenylphosphane ligands

The reaction of silver(I) halide with triphenylphosphine (PPh3) and 1,3-diisopropyl-2-thiourea (DSPTU) gave mononuclear complexes of formula [AgX(DSPTU)(PPh3)], [where X = Br (1) and Cl (2)]. Complexes (1) and (2) were characterized by infrared (IR) spectroscopy and their structures determined by single crystal X-ray diffraction. The two complexes are isostructural and isomorphous, with the Ag(I) ion exhibiting a distorted trigonal planar coordination with one P atom from the PPh3 ligand, one terminal S atom from the DSPTU ligand, and a halide ion. Intramolecular N-H X hydrogen bonds are observed in both complexes (graph set motif S(6)). In the crystal, the amine and halide group are linked into a 1D zigzag chain along the b axis by N-H X hydrogen bonds.