Nitrosyltechnetium complexes with (2-aminomethylphenyl)diphenylphosphine

Nitrosyltechnetium(I) Complexes with 2‐(Diphenylphosphanyl)aniline

“…All attempts to obtain a 99 Tc NMR signal failed. This is unusual for technetium(I) complexes, but in a line with the related compound [Tc(NO)Cl 2 (H 2 L2) 2 ] . The same holds true for the 31 P NMR spectra of 1 and [Tc(NO)Cl 2 (H 2 L2) 2 ].…”

“…The IR spectrum of cis‐NO,Cl,trans‐P,P ‐[Tc I (NO)Cl(H 2 L1) 2 ]Cl shows the ν(NO) vibration as an intense band at 1709 cm –1 , which is in the common range for Tc I complexes, but significantly lower than the value for the Tc II complexes isolated with H 2 L2 . This is readily explained with the higher degree of back donation in technetium(I) compounds.…”

“…In a previous work, we reported some reactions of H 2 L2 with (NBu 4 )[Tc(NO)Cl 4 (MeOH)]. Various technetium(I) and technetium(II) complexes were obtained depending on the condition applied . Such findings stimulated us to extend these studies to related reaction with H 2 L1.…”

The Reaction of Cs2[Tc(NO)F5] with BF3 in Acetonitrile: Formation and Structure of [{Tc(NO)(CH3CN)4}2(μ‐F)](BF4)3

“…An early example is the thionitrosyl complex [Tc(NS)Cl 2 (PMe 2 Ph) 3 ] with a resonance at +645 ppm, where obviously strong π bonding between the d π orbitals of the metal and the π* orbital of the NS + ligands is responsible for a significant deshielding of the technetium nucleus. Recent studies on nitrosyltechnetium(I) complexes confirm the strong influence of such multiply bonded ligands on the chemical shifts observed in related complexes: all hitherto published Tc chemical shifts of nitrosyls are found between –460 and +2017 ppm , , , , . This stands for a significant shift of electron density from the metal into the nitrosyl ligand.…”

“…As in Cs 2 [Tc(NO)F 5 ] and the other hitherto structurally studied nitrosyl complexes of technetium, the nitrosyl ligand is linearly coordinated and formally regarded as NO + . The unprecedented fluorido bridge between two {Tc(NO)} units is bent with an angle of 140.4(2)°.…”