63056-54-2Relevant academic research and scientific papers
Bis(arylazo-oximato)palladium(II); Synthesis, Palladium-Nitrogen Bond Lability, and Redox Activity
Bandyopadhyay, Pinaki,Mascharak, Pradip K.,Chakravorty, Animesh
, p. 623 - 627 (2007/10/02)
The synthesis and characterisation of the title complex, , and related mixed-ligand complexes including (A = ortho-metallated azobenzene) are described.The mass spectrum of reveals peaks corresponding to loss of oximato-O and NO from the parent ion.Gaseous HCl cleaves the Pd-N(oxime) bond selectively.Triphenylphosphine cleaves one or both Pd-N(azo) linkages giving and unstable which is also produced by oxidative addition of HL to .In the unidentate and bidentate L groups scramble rapidly at 308 K but slowly at 233 K (1H n.m.r.).Bidentate phosphine and phosphinoarsine cleave the two Pd-N(azo) bonds simultaneously.Unidentate amines, when present in very large excess, produce unstable in which one L is unidentate.Addition of X2 (X= Cl or Br) yields the unstable palladium(IV) complex which is readily reduced to halogeno-bridged palladium(II) species.A cyclic-voltammetric study of the one-electron quasi-reversible reduction of , , etc. at a platinum electrode is briefly reported.
Selective Cleavage of the Two Types of Pd-N Bonds in Di-μ-halogeno-bis
Mascharak, Pradip K.,Chakravorty, Animesh
, p. 1698 - 1702 (2007/10/02)
Triarylphosphines split the halogen bridge of the title complex and also open the arylazo-oximato chelate ring at the azo-end.In solution an equilibrium exists between the closed-ring and open-ring species.The equilibrium constants are reported.Bidentate phosphine and phosphinoarsine simultaneously split the bridge and cleave the Pd-N(azo) bond.Anhydrous HCl gas protonates the oximato-group with its concomitant displacement by Cl-ion; in effect the Pd-N(oxime) bond is selectively cleaved.
