Multimetallic complexes of group 10 and 11 metals based on polydentate dithiocarbamate ligands

Abstract

The ligands KS₂CN(Bz)CH₂CH₂N(Bz)CS₂K (K₂L¹), N(CH₂CH₂N(Me)CS₂Na)₃ (Na₃L²), and the new chelates {(CH₂CH₂)NCS₂Na}₃ (Na₃L³) and {CH₂CH₂N(CS₂Na)CH₂CH₂CH₂NCS₂Na}₂ (Na₄L⁴), react with the gold(I) complexes [ClAu(PR₃)] (R = Me, Ph, Cy) and [ClAu(IDip)] to yield di-, tri-and tetragold compounds. Larger metal units can also be coordinated by the longer, flexible linker, K₂L¹. Thus two equivalents of cis-[PtCl₂(PEt₃)₂] react with K₂L¹ in the presence of NH₄PF₆ to yield the bimetallic complex [L¹{Pt(PEt₃)₂}₂](PF₆)₂. The compounds [NiCl₂(dppp)] and [MCl₂(dppf)] (M = Ni, Pd, Pt; dppp = 1,3-bis(diphenylphosphino)propane, dppf = 1,1'-bis(diphenylphosphino)ferrocene) also yield the dications, [L¹{Ni(dppp)}₂]²⁺ and [L¹{Ni(dppf)}₂]²⁺ in an analogous fashion. In the same manner, reaction between [(L′₂)(AuCl)₂] (L′₂ = dppm, dppf; dppm = bis(diphenylphosphino)methane) and KS₂CN(Bz)CH₂CH₂N(Bz)CS₂K yield [L¹{Au₂(L′₂)}₂]. The molecular structures of [L¹{M(dppf)}₂](PF₆)₂ (M = Ni, Pd) and [L¹{Au(PR₃)}₂] (R = Me, Ph) are reported.