Polymeric gold(I) diisobutyl dithiophosphate, [Au2{S2P(O-iso-C4H9)2}2]n: Synthesis, supramolecular self-organization (a role of aurophilic interaction), 13C and 31P MAS NMR spectroscopy, and thermal behavior

A new polymeric gold(I) diisobutyl dithiophosphate (Dtph), [Au 2 {S 2 P(O- iso -C 4 H 9 ) 2 } 2 ] n ( I ), was preparatively obtained and characterized by 13 C and 31 P MAS NMR spectroscopy and X-ray diffraction (CIF file CCDC no. 977818). Diagrams of the χ 2 statistic were constructed from the complete 31 P MAS NMR spectra and used to calculate the 31 P chemical shift anisotropy (δ aniso = δ zz − δ iso ) and the asymmetry parameter η = (δ yy − δ xx )/(δ zz − δ iso ). The main structural unit of complex I is the noncentrosymmetric dinuclear molecule [Au 2 {S 2 P(O- iso -C 4 H 9 ) 2 } 2 ], in which the gold atoms are linked by two bridging ligands Dtph. The central cyclic structural fragment of the dimer [Au 2 S 4 P 2 ] is additionally stabilized by the intramolecular aurophilic interaction Au⋯Au. Further supramolecular self-organization of the complex involves intermolecular aurophilic bonds Au⋯Au that serve to unite adjacent dinuclear molecules [Au 2 {S 2 P(O- iso -C 4 H 9 ) 2 } 2 ] with different spatial orientations into the polymer chains ([Au 2 {S 2 P(O- iso -C 4 H 9 ) 2 } 2 ]) n . The thermal behavior of complex I was examined by synchronous thermal analysis under argon. The character of the thermolysis of the complex to reduced metallic gold as a final product was determined.