Synthese und Röntgenstrukturanalyse von Tris(diethyldithiocarbamato) dimethylphenylphosphantechnetium(III), einem Technetium-Komplex mit der Koordinationszahl 7

Preparation and Crystal and Molecular Structure of Tris(diethyldithiocarbamato)dimethylphenylphosphinetechnetium (III) The title compound Tc(S₂CNEt₂)₃(Me₂PhP) I has been prepared by the reaction of TcCl₃(Me₂PhP)₃ with NaS₂CNEt₂. The crystal structure of I has been determined by single-crystal X-ray diffraction methods at room temperature. Crystals are rhombic, space group P2₁2₁2₁, with a = 8.708(1), b = 12.012(1), c = 29.626(3) Å and Z = 4. The compound consists of discrete I molecules. The technetium atom has a seven-coordinated environment which is best described as a distorted pentagonal bipyramid. The Tc—P distance (2.330(3) Å) is remarkably short compared with other technetium complexes with mono-dentate phosphine ligands.