Notes. Synthesis and structure of a new inorganic dianionic bis(dithiocarbonato)nitridotechnetate(V) complex K2[TcN(S2CO)2]·2H2O

Abstract

The nitrido compound [TcNCl₂(PPh₃)₂] reacts with K(S₂COEt) to give in aqueous medium the complex K₂[TcN(S₂CO)₂]. The crystal structure has been determined by X-ray crystallography: monoclinic, space group P2₁/n, with a= 8.353(5), b= 15.630(4), c= 9.230(5)Å, and β= 90.94(3)°. The structure has been refined to a final R of 0.035 based on 2 803 observed reflections. The metal ion is five-co-ordinate in a distorted square-pyramidal arrangement. Selected bond distances (Å) are Tc–S 2.390 (mean), Tc–N 1.621 (6), C–S 1.780 (mean), and CO 1.207 Å(mean).