title: Density functional studies of closed-shell attractions of S(AuPH3)2 and HS(AuPH3)2 + and their dimers.
abstract: With the help of quantum chemical calculations, S(AuPH3)2, [HS(AuPH3)2]+ and their dimers have been examined by using scalar-relativistic theory. In agreement with experimental data, [HS(AuPH3)2 +]2 is a C(2h) structure. However, [S(AuPH3)2]2 is predicted to favor a D(2d) structure. Experimental structure parameters of the title compounds were reproduced at the Xalpha level. The electronic structure and HOMO-LUMO gaps were investigated. When two monomers formed a dimer, the electronic structure of the dimer changed only slightly, but the chemical stability decreased. The intermolecular aurophilic interaction energy is decomposed and analyzed.
authors.affiliation: College of Material Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China. susanfang@nuaa.edu.cn
authors.forename: Hua
authors.initials: H
authors.lastname: Fang
authors.forename: Xiao-Gang
authors.initials: XG
authors.lastname: Zhang
authors.forename: Shu-Guang
authors.initials: SG
authors.lastname: Wang
mesh_terms: D019281:Dimerization; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D050607:Organogold Compounds / Q000737:chemistry*; D011789:Quantum Theory; D013816:Thermodynamics
chemical_list: D050607:Organogold Compounds