107079-46-9Relevant academic research and scientific papers
Aerobic Photooxidation and C-C Bond Cleavage of the Acetylacetonate Ligand in (2-Arylazo)arylpalladium(II) Complexes Induced by Visible Light
Vicente, Jose,Arcas, Aurelia,Bautista, Delia,Shul'pin, Georgiy B.
, p. 1505 - 1510 (2007/10/02)
(Arylazo)aryl(acetylacetonato)palladium(II) complexes, (R = H 1a, Me 1b or OMe 1c; Hacac = acetylacetone), upon irradiation of their acetone solutions at room temperature by UV, or even long-wavelength visible (λ > 500 nm) light, were readily oxidized by atmospheric oxygen to give the corresponding acetato derivatives 2 (R = H 2a, Me 2b or OMe 2c), providing a model for some chemical and biological processes.The oxidation reaction of complex 1b was first order in the complex 0 -3.Complexes 1b and 1c were photooxidized at approximately twice the rate of complex 1a.In the presence of a scavenger of C-centred radicals (CCl4) the rate of complex 2b accumulation was reduced.When pyridine was added or co-ordinating solvents (acetonitrile or nitromethane) were used no photooxidation of comlex 1 occured.In the presence of PPh3 an induction period was observed and the oxidation of 1 strted only after all the PPh3 was oxidized under irradiation into OPPh3.Spectroscopic data suggested that these ligands inhibit this photochemical oxidation because they change the type of co-ordination of the azobenzene chromophore and/or the acac ligands inducing a disconnection between the chromophore (antenna) and the acac ligand.
Bis-ortho-metalated palladium complexes. New examples and reactivity. The X-ray crystal structure of cis-(2-C6H5N=NC6H4)2Pd and cis-(2-C6H5N=NC6H4)(2-Me 2NCH2C6H4)Pd
Janecki, Tomasz,Jeffreys, John A. D.,Pauson, Peter L.,Pietrzykowski, Antoni,McCullough, Kevin J.
, p. 1553 - 1560 (2008/10/08)
Reaction of bis[(2-(arylazo)aryl)chloropalladium] with 2-lithio-N,N-dimethylbenzylamine yields the "mixed" ortho-metalated cis-[(2-arylazo)aryl)(2-((dimethylamino)methyl)phenyl]palladium], together with both bis(2-(arylazo)aryl)palladium and bis(2-((dimethylamino)methyl)phenyl)palladium. The X-ray structures of cis-[(bis(2-phenylazo)phenyl)palladium] and of cis-[(2-((dimethylamino)methyl)phenyl)-(2-(phenylazo)phenyl)palladium] have been determined and compared with those of known related molecules. The ((arylazo)aryl)palladium complexes fail to insert alkenes. Bis(2-((dimethylamino)methyl)phenyl]-palladium is shown to insert both styrene and carbon monoxide, and the efficient insertion of methyl acrylate into bis[(2-((tert-butylimino)methyl)phenyl)chloropalladium] is also described. β-Elimination following insertion leads to the palladium-free product in each case.
