Crystal structure of diiodobis(o-phenylenebis(dimethylarsine))gold(III) iodide-a discrete six-coordinate cationic complex of gold(III)

The crystal and molecular structure of bis(dimethyl-o-thiolophenylarsine)platinum(II)

“…Finally, examination of all metal-carbon distances reveals some interesting facts. The As-CH3 distances of 1.933(10) and 1.942(19) A are in good agreement with similar distances observed in the diarsine complexes (Stephenson, 1962(Stephenson, , 1964Stephenson & Jeffrey, 1963;Duckworth & Stephenson, 1969). There is a significant difference (0.03 A) between the As-C (benzene) Table 6.…”

“…Thus, in scheme I, the compounds M(As-SCH3)2X2 might well be examples of sixcoordinate, diamagnetic d 8 complexes. Verification of octahedral coordination in these compounds has been limited (Stephenson, 1962;Stephenson & Jeffrey, 1963;Duckworth & Stephenson, 1969). In fact Pd(As-SCH3)212…”

Stable AuIII complexes with four N-heterocyclic carbene groups can be prepared in high yield directly from KAuCl4

“…[Au(dien)C1 3 ] (dien = diethylenetriamine), etc., [36][37][38] but are much shorter than the sum of the van der Waals radii of the atoms (∼4.1 Å for Au⋯Cl). 39 This type of distorted octahedral structural motif has been reported 34,36,38,40 in only a few cases for Au III (Table S1 †), and is presumably a consequence of these complexes being 20 electron complexes. For [AuL 3 Cl 2 ]Cl·(MeOH) 3.5 4·(MeOH) 3.5 , the coordination of Au III is broadly similar to that seen in [Au(L 1 ) 2 Cl 2 ]Cl·(MeOH) 2 2·(MeOH) 2 and [Au(L 2 ) 2 Cl 2 ]-Cl·(MeOH) 3·(MeOH), but is complicated by the effects of solvation, the axial sites modelled as being partially occupied by chlorido ligands and solvent (methanol) molecules.…”

“…[Au(phen)(CN) 2 Br] and [Au (diars) 2 I 2 ] + ), albeit strongly distorted, the axial metal-ligand bonds being longer than the equatorial ones. 33,34 In this paper, we report six new complexes containing the Au III (NHC) 4 motif. The complexes were prepared simply by treatment of KAuCl 4 with imidazolium salts in the presence of acetate.…”

X-ray structural investigations of gold compounds

“…The addition compound between H 30+AuC14 and 2,2-dimethyl-2H-benzimidazole-1,3-dioxide shows axial Au.. .0 contacts of 318 pm (Au-O bonds in Au" oxide complexes are about 210 pm) and has been described as approximately octahedral' (149) while [Au(diars) 2I 211 has been reported as `octahedral' (150). However, efficiency of packing in the crystal may dictate that some species should lie along these axes, even if rather distant from the gold atom.…”