Mono- and Bi-nuclear Gold(I), Gold(II), and Gold(III) Perhalogenoaryl Complexes with the Ligand Bis(diphenylphosphino)amine. Crystal and Molecular Structure of μ--dichlorobis(pentafluorophenyl)digold(II)

Article abstract of DOI:10.1039/DT9860000291

Addition of bis(diphenylphosphino)amine (dppa) to neutral or cationic gold(I) and gold(III) complexes containing weakly co-ordinating neutral ligands leads to the formation of complexes of the following types: , 2, , and (R=C6F5 or C6Cl5).Oxidative-addition of halogens X2 (X=Cl or Br) to the gold(I) complexes leads to the gold(II) derivatives and 2 which can be further arylated with Ag(C6F5) to give and 2.Mixed gold(III)-gold(I) derivatives can also be synthesized either by the spontaneous isomerization of the gold(II) complexes or from mononuclear gold(III) derivatives.The structure of the complex<(C6F5)ClAu(dppa)AuCl(C6F5)> has been determined by single-crystal X-ray diffraction: space group C2/c, a=18.009(3), b=17.033(2), c=18.420(3) Angstroem, β=103.79(2) deg, Z=4, and R=0.035 for 4000 unique observed reflections.The molecule possesses crystallographic two-fold symmetry, with Au-Au 2.576(2) Angstroem; this is the shortest reported Au-Au bond.The unit cell also contains eight di-isopropyl ether and four water molecules, which are well ordered and form a hydrogen bonding network with the amine N-H group.

Full text of DOI:10.1039/DT9860000291

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