Nitrosyltechnetium complexes with (2-aminomethylphenyl)diphenylphosphine

Reactions of (NBu4)[Tc(NO)Cl4(MeOH)] (1) with (2-aminomethylphenyl)diphenylphosphine, H2L1, give different products depending on the conditions applied. An equimolare reaction in MeOH gives the technetium(II) monochelate [Tc(NO)Cl3(H2L1-κN,P)] (2) as the sole product, which could be isolated. Reduction of the metal ion and the formation of the Tc(I) complexes [Tc(NO)Cl2(H2L1-κN,P)(H2L1-κN)] (3) and [Tc(NO)Cl(H2L1-κN,P)2]Cl (4), besides some (NBu4)[Tc(NO)Cl4(H2L1-κN)] (5), is observed when an excess of the H2L1 is used in the same solvent. Reactions in acetonitrile are less defined and only the Tc(II) compound (NBu4)[Tc(NO)Cl4(H2L1O-κN)] (6) could be isolated from such reactions in crystalline form. oducts were studied spectroscopically and by X-ray diffraction. The aminophosphine acts as monodentate nitrogen donor ligand or as N,P chelator.