Organoamidometallics. II. Decarboxylation Syntheses and Structures of [N,N-Dimethyl-N'-(Polyfluorophenyl)Ethane-1,2-Diaminato(1-)]Platinum(II) Complexes

Abstract

The complexes Pt[N(p-HC₆F₄)CH₂CH₂NMe₂]X(L) (L = py , X = Cl or Br; L = 2- methylpyridine or 4-methylpyridine, X = Cl ) have been prepared by decarboxylation reactions between PtX₂( dmen ) ( dmen = N,N- dimethylethane - 1,2-diamine) and thallous pentafluorobenzoate in the appropriate hot pyridine. Other organoamidoplatinum (II) complexes, Pt[N(R)CH₂CH₂NMe₂] X( py ) (R = p-HC₆F₄, X = I; R = C₆F₅, X = Cl , Br or I; R = p-MeC₆F₄, X = Cl ; R = p-ClC₆F₄ or p-BrC₆F₄, X = I) and Pt[N(R)CH₂CH₂NMe₂] Cl ( dmpy ) (R = p-HC₆F₄; dmpy = 2,5-dimethylpyridine), have been prepared by analogous decarboxylations between PtX₂( dmen ), thallous 2,3,5,6- tetrafluorobenzoate, and the corresponding polyfluorobenzene, RF. The mixed halogen complex Pt[N(C₆F₅)CH₂CH₂NMe₂]I_0.63Cl_0.37( py ) has been prepared similarly and the crystal structure determined. This shows square-planar stereochemistry with the halogen and pyridine trans to NC₆F₅ and NMe₂ respectively. Comparison of spectroscopic data suggests the other complexes have similar stereochemistry.