Complexes containing nitrosyl or thionitrosyl groups

The green compound /ram- Tc (NH3)4(N0)(H20)]Cl3, the first identified nitrosyl complex of Tc(II), was prepared by oxidation of the pink complex salt tram-[Tc (NH3)4(N0)(H20) Cl2 [541] with Ce(lV) in 2M HCIO4. The magnetic moment of the Tc(II) complex was found to be B.M. at room temperature. The composi- 

Green leallets of /i-But4N][ rc(NO)l4] were obtained by reaction of the analogous bromo compound with III in refluxing acetone [546]. The EPR hyperfinc spectra of 

When [Tc(KO)CU] in aqueous solution is heated with acetylacetone, the mixed ligand anion [Tc(NO)(acac)Cl3] is formed, which gives a red precipitate with [As(Ph)4]Cl. [AsPh4j[Tc(NO)(acac)Cl3] crystallizes in the triclinic space group P  

The thionitrosyl tetrahalogeno complex anions [Tc(NS)Cl4] and [Tc(NS)Br4] were synthesized by reaction of [TcClf,] and [TcBrf,] , respectively, with trithiazyl chloride, (NSC1)3. Yellow [Ph4As][Tc(NS)Cl4j was obtained when [Ph4As]2[ l cCU] was reacted with (NSCI)3 in dichloromethane. The N-S stretch of the complex appeared at 1219 cm in the IR. Red-brown [Ph4As][Tc(NS)Br.,] was obtained by 

A Trichl()ro-//Y s-bis(dimclhylphenylphos-phine)-thioniir )svltechnclium(Il). [ rc(NS)CK(MeiPhP) f271J. 

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