REACTIONS OF PALLADIUM COMPOUNDS WITH ACETYLENES: II. TETRAKIS(p-CHLOROPHENYL)CYCLOBUTADIENE PALLADIUM COMPLEXES

1965 ◽  
Vol 43 (2) ◽  
pp. 470-478 ◽  
Author(s):  
P. M. Maitlis ◽  
D. Pollock ◽  
M. L. Games ◽  
W. J. Pryde
Keyword(s):  
Transfer Reaction ◽  
Methylene Chloride ◽  
Hydrogen Bromide ◽  
Palladium Complexes ◽  
Palladium Chloride ◽  
Palladium Compounds ◽  
New Type ◽  
Iron Tricarbonyl ◽  
Ligand Transfer

It is found that both diphenylacetylene and bis(p-chlorophenyl)acetylene on reaction with bis(benzonitrile)palladium chloride in benzene give the benzenoid trimer (R6C6) as well as a new type of cyclobutadiene complex [(R4C4)(PdCl2)x]2(R = Ph and p-ClC6H4) for which structure IV is proposed. p,p′-Dichlorotolan reacts with bis(benzonitrile)palladium chloride in ethanol – methylene chloride to give a complex [(R4C4OC2H5)PdCl]2 (II) which is converted into the normal cyclobutadiene complex [(R4C4)PdBr2]2 (V) on treatment with hydrogen bromide. This can also be obtained from IV. The tetrakis(p-chlorophenyl)cyclobutadiene palladium halides on treatment with tri-n-butylphosphine give a dimer of tetrakis(p-chloro-phenyl)cyclobutadiene which is probably octakis(p-chlorophenyl)cyclooctatetraene. Tetrakis-(p-chlorophenyl)cyclobutadiene iron tricarbonyl has also been prepared from IV and V by a ligand-transfer reaction.

Photoreaktionen 2-sulfinylsubstituierter Benzaldehydeeine neue photoinduzierte Sauerstoff-Transfer-Reaktion / Photoreactions of 2-Sulfinyl Substituted Benzaldehydes aNew Photoinduced Oxygen-Transfer Reaction

1976 ◽  
Vol 31 (12) ◽  
pp. 1658-1661 ◽  
Author(s):  
Reinhard Lüdersdorf ◽  
Klaus Praefcke
Keyword(s):  
Oxygen Atom ◽  
Oxygen Transfer ◽  
Redox Reaction ◽  
Transfer Reaction ◽  
Ortho Position ◽  
Benzoic Acids ◽  
Photochemical Conversion ◽  
New Type ◽  
Substituted Benzaldehydes ◽  
Sulfinyl Group

The photochemical conversion of 2-sulfinyl substituted benzaldehydes into benzoic acids in a new type of redox reaction is discribed in which a transfer of an oxygen atom, originally attached to sulphur, takes place by insertion into the C-Η bond of the aldehyde function located in ortho position. Influences of substituents at the sulfinyl group in this photoreaction which seems to be limitated to aldehydes are discussed briefly.

Methoxycarbonylation of Styrene Using a New Type of Palladium Complexes Bearing P,N-donor Ligands as Catalysts

2015 ◽  
Vol 145 (7) ◽  
pp. 1396-1402 ◽  
Author(s):  
Gabriel Abarca ◽  
Kareen Brown ◽  
Sergio A. Moya ◽  
J. Carles Bayón ◽  
Pedro A. Aguirre
Keyword(s):  
Palladium Complexes ◽  
Donor Ligands ◽  
New Type

scholarly journals Insertion Reactions Involving Palladium Complexes with Nitrogen Ligands. 2. Carbon monoxide and Alkene Insertion Reactions with Novel Palladium Compounds Containing Terdentate Ligands

1996 ◽  
Vol 15 (2) ◽  
pp. 668-677 ◽  
Author(s):  
Richard E. Rülke ◽  
Vincent E. Kaasjager ◽  
Dave Kliphuis ◽  
Cornelis J. Elsevier ◽  
Piet W. N. M. van Leeuwen ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Palladium Complexes ◽  
Insertion Reactions ◽  
Nitrogen Ligands ◽  
Palladium Compounds

Redox behavior of novel nickel and palladium complexes supported by trianionic non-innocent ligand containing β-diketiminate and phenol groups

2015 ◽  
Vol 19 (01-03) ◽  
pp. 377-387 ◽  
Author(s):  
Yuma Morimoto ◽  
June Takaichi ◽  
Shinichi Hanada ◽  
Kei Ohkubo ◽  
Hideki Sugimoto ◽  
...  
Keyword(s):  
Palladium Complex ◽  
Protonated Form ◽  
Palladium Complexes ◽  
Dalton Trans ◽  
Tert Butyl ◽  
Redox Active ◽  
Amino Phenol ◽  
New Type ◽  
The One ◽  
Nickel And Palladium Complexes

A new type of nickel and palladium complexes with non-innocent β-diketiminate ligand having redox active phenol groups, 2,4-di-tert-butyl-6-(((1E,2E)-3-((3,5-di-tert-butyl-2-hydroxyphenyl)amino)-2-nitroallylidene)amino)phenol ( L H 3, fully protonated form) have been developed, and the structure, physical properties, and reactivity of their one-electron and two-electron oxidized complexes, [MII(L•2-)] and [MII(L-)]+ ( M = Ni II or Pd II ) have been examined in detail. The two-electron oxidized forms of both complexes, [MII(L-)]+, exhibited hydrogen atom abstraction ability from 1,4-cyclohexadiene (CHD) comparable to its copper analog [ Cu II ( L -)]+ (Dalton Trans. 2013; 42: 2438-2444). The one-electron oxidized form of palladium complex, [ Pd II ( L •2-)], was also found to oxidize CHD, whereas the nickel analog, [ Ni II ( L •2-)], exhibited photo-induced oxidation ability of CHD.

Cyclobutadiene–metal complexes. XI. Tetramethylcyclobutadienecobalt(I) complexes

1967 ◽  
Vol 45 (18) ◽  
pp. 2017-2021 ◽  
Author(s):  
R. Bruce ◽  
P. M. Maitlis
Keyword(s):  
Metal Complexes ◽  
Low Temperatures ◽  
Transfer Reaction ◽  
Quantitative Yield ◽  
Dicobalt Octacarbonyl ◽  
Nickel Tetracarbonyl ◽  
Ligand Transfer

The ligand-transfer reaction of tetramethylcyclobutadienenickel chloride dimer with dicobalt octacarbonyl gave tetramethylcyclobutadienedicobalt hexacarbonyl [Me4C4Co(CO)2Co(CO)4] and nickel tetracarbonyl. Triphenylphosphine replaced one carbonyl in Me4C4Co(CO)2·Co(CO)4 to give Me4C4Co(CO)2·Co(CO)3PPh3. Both Me4C4Co(CO)2·Co(CO)4 and Me4C4Co(CO)2·Co(CO)3PPh3 underwent cleavage with iodine at low temperatures to give tetramethylcyclobutadienecobalt dicarbonyl iodide (Me4C4Co(CO)2I); this was also obtained in quantitative yield from [Me4C4NiI2]2 and Co2(CO)8. One carbonyl in Me4C4Co(CO)2I was replaced on reaction with triphenylphosphine, giving Me4C4Co(CO)(PPh3)I. Me4C4Co(Co)2I reacted with both sodium cyclopentadienide and [C5H5Fe(CO)2]2 to give (π-cyclopentadienyl)-(π-tetramethylcyclobutadiene) cobalt.

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