A Stable (Amino)(phosphino)carbene as Bidentate Ligand for Palladium and Nickel Complexes: Synthesis, Structure, and Catalytic Activity.

ChemInform ◽  
2006 ◽  
Vol 37 (29) ◽  
Author(s):  
Emmanuelle Teuma ◽  
Celine Lyon-Saunier ◽  
Heinz Gornitzka ◽  
Gerard Mignani ◽  
Antoine Baceiredo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Nickel Complexes ◽  
Bidentate Ligand

scholarly journals A stable (amino)(phosphino)carbene as bidentate ligand for palladium and nickel complexes: Synthesis, structure, and catalytic activity

2005 ◽  
Vol 690 (24-25) ◽  
pp. 5541-5545 ◽  
Author(s):  
Emmanuelle Teuma ◽  
Céline Lyon-Saunier ◽  
Heinz Gornitzka ◽  
Gérard Mignani ◽  
Antoine Baceiredo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Nickel Complexes ◽  
Bidentate Ligand

Synthesis, structure, and catalytic activity of nickel complexes with new chiral binaphthyl-based NHC-ligands

2013 ◽  
Vol 729 ◽  
pp. 40-45 ◽  
Author(s):  
Haibin Song ◽  
Dongna Fan ◽  
Yuqiao Liu ◽  
Guohua Hou ◽  
Guofu Zi
Keyword(s):  
Catalytic Activity ◽  
Nickel Complexes

scholarly journals Synthesis, spectral characterization, cyclic voltammety, molecular modeling and catalytic activity of sulfa-drug divalent metal complexes

2014 ◽  
Vol 10 (2) ◽  
pp. 2234-2245
Author(s):  
Safaa N. Abdou ◽  
Abeer A. Faheim ◽  
Abdel-Nasser M. A. Alaghaz
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes ◽  
Molar Conductance ◽  
Divalent Metal ◽  
Bidentate Ligand ◽  
Spectral Studies ◽  
Ligand Field ◽  
Spectroscopic Techniques ◽  
Sulfa Drug ◽  
Divalent Metal Complexes

Complexes of cobalt(II), nickel(II), copper(II), zinc(II) and Hafnium(II) of general composition [M(L)2(Cl)2] have been synthesized [L = 4-(phenylphosphinylideneamino-N-thiazolylbenzenesulfonamide]. The elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, IR, UV, NMR, SEM, EDX, thermal and EPR spectral studies of the compounds led to the conclusion that the ligand acts as a bidentate manner. The molar conductance of the complexes in fresh solution of DMSO lies in the range of 7.46–9.13 Ω-1 cm2mol‒1 indicating their non-electrolytic behavior. On the basis of analytical and spectroscopic techniques, octahedral geometry of the complexes was proposed. The ligand acts as bidentate ligand, coordinated through sulfonamide oxygen and thiazole nitrogen atoms. The ligand field parameters were calculated for Co(II), Ni(II) and Cu(II) complexes and their values were found in the range reported for a octahedral structure. The catalytic activities of the divalent metal complexes have been studied in the oxidation of cyclohexane, using environmental friendly oxidant, hydrogen peroxide. Complex with rough surface has shown higher catalytic activity compared to the other complexes. The molecular parameters of the ligand and its Co(II) and Hf(II) complexes have been calculated. 

Complexes of transition metals bonded to silica via β-diketonate groups — synthesis, structure, and catalytic activity

2008 ◽  
Vol 62 (3) ◽  
Author(s):  
Iwona Rykowska ◽  
Włodzimierz Urbaniak
Keyword(s):  
Gas Chromatography ◽  
Catalytic Activity ◽  
Transition Metal Complexes ◽  
Silica Surface ◽  
Nickel Complexes ◽  
Complexes Of Transition Metals ◽  
Complexation Gas Chromatography ◽  
Immobilized Complexes ◽  
Metal Complex Catalysts

AbstractTransition metal complexes bonded to silica via silanes with β-diketonate groups can be used as packings for complexation gas chromatography or as immobilized homogenous metal complex catalysts. On basis of elemental analysis and the determination of surface area, possible structures of the complexes formed on the silica surface have been proposed. The possibility of using the immobilized complexes as catalysts has been indicated. Especially nickel complexes were taken into consideration. These immobilized complexes were used previously as packings for complexation gas chromatography.

Coordination chemistry of a mixed donor bidentate ligand with nickel. A tetrameric enolate of sodium that binds a phosphine donor

1995 ◽  
Vol 73 (7) ◽  
pp. 1175-1180 ◽  
Author(s):  
Michael D. Fryzuk ◽  
Xiaoliang Gao ◽  
Steven J. Rettig
Keyword(s):  
Coordination Chemistry ◽  
Nickel Complexes ◽  
Bidentate Ligand ◽  
Homogeneous Catalyst ◽  
Phosphonium Salts ◽  
Donor Ligand ◽  
Full Matrix ◽  
Space Group ◽  
Tetrameric Structure ◽  
Catalytic Behaviour

The preparation of a mixed donor ligand consisting of an enolate and neutral phosphine is described and its coordination chemistry with nickel reported. The phosphino ketones R2PCH2COPh (R = Cy or Pri) are prepared by the reaction of the corresponding secondary phosphines with bromoacetophenone to form the corresponding phosphonium salts [R2P(H)CH2COPh]+Br− (R = Cy or Pri); subsequent deprotonation leads to the neutral ketones. The enolates are formed by addition of NaN(SiMe3)2 to the neutral ketone. The crystal structure of the sodium enolate having isopropyl substituents at phosphorus displays a tetrameric structure in the solid state and there is an interaction of the phosphorus donor with the sodium anion: Na—P, 2.852(2) Å. The preparation of a series of nickel complexes was achieved by addition of the sodium enolate to the appropriate Ni(II) starting material. The structures of the nickel derivatives are reported. The catalytic behaviour of one of these complexes in the polymerization and oligomerization of ethylene is briefly described. Crystals of {Na[Pri2PC(H)=C(O)Ph]}4, 2b, are tetragonal, a = b = 20.790(2) Å, c = 13.539(7) Å, Z = 4, space group I41/a1; those of [Cy2PC(H)=C(O)Ph](PPh3)NiPh, 3a, are triclinic, a = 10.742(2) Å, b = 19.811(3) Å, c = 10.621(2) Å, α = 101.88(1)°, β = 119.24(1)°, γ = 91.08(1)°, Z = 2, space group [Formula: see text] and those of [Pri2PC(H)=C(O)Ph](PPh3)NiPh, 3b, are triclinic, a = 10.219(1) Å, b = 17.432(3) Å, c = 9.788(1) Å, α = 101.18(1)°, β = 100.19(1)°, γ = 85.32(1)°, Z = 2, space group [Formula: see text] The structures were solved by direct (2b) and Patterson (3a and 3b) methods and were refined by full-matrix least-squares procedures to R = 0.045, 0.044, and 0.032 (Rw = 0.038, 0.041, and 0.030) for 965, 4483, and 5085 reflections with I > 3σ(I) respectively. Keywords: nickel, sodium enolate, homogeneous catalyst, oligomerization.

scholarly journals A Study on Biological and Catalytic Activity of CSB Derivative and its Cobalt and Nickel Complexes

2016 ◽  
Vol 32 (5) ◽  
pp. 2509-2516
Author(s):  
R. Suresh ◽  
M. Deepa ◽  
P. Moganavally ◽  
P. Sudha
Keyword(s):  
Catalytic Activity ◽  
Nickel Complexes ◽  
Cobalt And Nickel
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