Technetium(V) nitrido complexes with tetra-azamacrocycles: monocationic and neutral octahedral complexes containing the [TcN]2+core. Crystal structure of [TcN(L1)H2O]·2H2O (H2L1= 1,4,8,11-tetra-azacyclotetradecane-5,7-dione)
摘要:
DOI:
10.1039/dt9900001935
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Synthesis, characterization and reactions of [Tc(NS)X4]− complexes (XCl, Br, NCS)
摘要:
The anions [Tc(NS)X4]- (X=Cl, Br or NCS) can be prepared from the reaction of TcCl62- and TcBr62-, respectively, with trithiazyl chloride, (NSCl)3. The equatorial ligands are kinetically labile and the complexes undergo ligand exchange reactions to form [Tc(NS)ClnBr4-n]- mixed-ligand complexes (n = 1-3) or the isothiocyanate analogue [Tc(NS)(NCS)4]-. The new compounds have been studied by EPR and the obtained parameters have been used to describe bonding properties. [Tc(NS)Cl4]- and [Tc(NS)Br4]- are instable in solution. Spontaneous decomposition results in nitridotechnetium(VI) complexes. The products have been characterized by EPR and X-ray diffraction.