231. Palladium(0) compounds. Part II. Compounds with triarylphosphines, triaryl phosphites, and triarylarsines

Malatesia, L.; Angoletta, Maria Elena

doi:10.1039/jr9570001186

Cited by 128 publications

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“…This was a very successful method for preparing the palladium (0) and platinum (0) derivatives with tertiary phosphines, phosphites, and arsines (4, 129,130,133). Also, the tetraisocyanidenickel(O) compounds can be obtained at high yield in this way (182).…”

Section: Methods Of Synthesismentioning

confidence: 96%

“…With ligands having reducing properties, as isocyanides (127), phosphines (129), and phosphites (106,189), the reduction can be brought about by the ligand itself-usually in ethanolic solution.…”

Section: Spontaneous Reductionmentioning

confidence: 99%

“…This method was described for preparing the tris and tetrakis palladium (0) derivatives with tertiary aromatic phosphines and phosphites (129).…”

Section: By Replacement Of Zerovalent Isocyanide Derivativesmentioning

confidence: 99%

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Chemistry of Zerovalent Nickel, Palladium, and Platinum Derivatives

Malatesta¹,

Ugo²,

Cenini³

1967

Werner Centennial

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The chemistry of the zerovalent state in nickel, palladium, and platinum compounds is reviewed. After a historical introduction in which the development of this chemistry is analyzed in terms of the current theory of the stabilization of low valency states, the most interesting classes of zero valent compounds are described. The stability and properties of these compounds are discussed and related to the nature of the ligands and the coordinated metal. The catalytic properties of these zerovalent derivatives toward olefins, diolefins, and acetylenes are considered in connection with the facility of ligands exchange, the varia tion of coordination number, and the stereochemistry. A discussion of the π bond is reported.'he first coordination compound with a low oxidation number, tetracarbonylnickel (HI), was discovered in 1890. Despite extensive efforts, however, very few substances of this type were synthesized in the next 50 years.The lack of any knowledge on the structure and bonds of these com pounds was responsible for the poor results. In fact, when tetracarbonylnickel was first prepared, Werner's theory had not as yet been postulated, and even later the theory was not extended to the carbonyls because they were considered anomalous compounds, owing to their chemical and physical properties.The studies on coordination compounds with the central metal in a low oxidation state began to fluorish just prior to World War II. Nickel, palladium, and platinum were particularly investigated for the following reasons:318

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Section: Methods Of Synthesismentioning

confidence: 96%

Section: Spontaneous Reductionmentioning

confidence: 99%

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Chemistry of Zerovalent Nickel, Palladium, and Platinum Derivatives

Malatesta¹,

Ugo²,

Cenini³

1967

Werner Centennial

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“…1 In a similar manner, (C 5 H 5 )Pd(g 3 -C 3 H 5 ) and (C 5 Me 5 ) Pd(g 3 -C 3 H 5 ) were obtained in 24 and 32% yield from C 5 H 5 Li and C 5 Me 5 Li, respectively. 1 H NMR (C 6 D 6 ) of (C 5 H 5 )Pd(g 3 [27] Pd(PPh 3 ) 4 , [28,29] (C 3 H 5 )PdCl (PPh 3 ) [30] and (C 3 H 4 Me)PdCl(PPh 3 ), [31] were prepared according to the procedure reported in literatures.…”

Section: Generalmentioning

confidence: 99%

Polymerization of Methyl Methacrylate with Homogeneous Organopalladium/MMAO Systems

Ihara

Maeno

Yasuda³

2001

Macromol. Chem. Phys.

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A series of Cp′Pd(η3‐C3H5)/MMAO systems was found to proceed in the syndio‐rich polymerization of methyl methacrylate in high yield, while these initiators were completely inert for polymerizations of styrene, ethylene, and isoprene. Among these complexes trimethylsilylated complexes such as (Me3SiC5H4)Pd(η3‐C3H5) 4 and [1,3‐(Me3Si)2C5H3]Pd(η3‐C3H5) 5 coupled with MMAO operate the polymerization to result in polymers with narrow molecular weight distributions and high syndiotacticities. In sharp contrast to these systems, alkyl substituted complexes like (tBuC5H4)Pd(η3‐C3H5) and (tBu2C5H3)Pd(η3‐C3H5) produced the polymers in poor yields with low syndiotacticities.

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“…Zerovalent metals of the Ni triad readilv form coordinativelv unsaturated complexes with sterically demanding phosphine ligands (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). Structural studies have confirmed coordination numbers of two and three for several complexes of Pt and Pd including Pt(PPh(t-Bu),), (I), Pd(PPh(t-Bu),), (1,2), Pd(PCy3), (2), Pt(PCy3), (3), and Pt(PPh3)3 (4).…”

Section: Introductionmentioning

confidence: 99%

The crystal and molecular structure of the coordinatively unsaturated Ni(0) species Ni(PPh₃)₃

Dick¹,

Stephan²,

Campana³

1990

Can. J. Chem.

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. Can. J. Chem. 68, 628 (1990). The disproportionation of the complex (Et2N)3Ti(pPCy2)Ni(PPh3) affords the coordinatively unsaturated species Ni(PPh3)3, 1. This compound crystallizes in the triclinic space group P1, with a = 18.483(4) A, b = 16.203(3) A, c = 17.783(4) A, a = 105.85(2)", P = 117.33(3)", y = 92.33(3)", Z = 4, and V = 4464(2) A3. Full-matrix least-squares refinement of 1042 variables using 6484 data ( F: > 3uF: ) gave R = 0.0441 and R , = 0.0438. The two crystallographically independent molecules are essentially identical, each exhibiting a trigonal planar coordination sphere at Ni. The most interesting feature of the structure is the close approach (2.744-3.094 A) of three ortho hydrogens of the PPh3 groups to the Ni centres. The implications of the structural data regarding ortho metallation and the known instability of 1 are discussed. On discute des implications des donnkes de la structure sur la mktallation en ortho et sur l'instabilite bien connue du compose.Mots clis : non-saturk d'un point de vue de la coordination, complexe du nickel avec des phosphines.[Traduit par la revue]

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231. Palladium(0) compounds. Part II. Compounds with triarylphosphines, triaryl phosphites, and triarylarsines

Cited by 128 publications

References 0 publications

Chemistry of Zerovalent Nickel, Palladium, and Platinum Derivatives

Chemistry of Zerovalent Nickel, Palladium, and Platinum Derivatives

Polymerization of Methyl Methacrylate with Homogeneous Organopalladium/MMAO Systems

The crystal and molecular structure of the coordinatively unsaturated Ni(0) species Ni(PPh₃)₃

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231. Palladium(0) compounds. Part II. Compounds with triarylphosphines, triaryl phosphites, and triarylarsines

Cited by 128 publications

References 0 publications

Chemistry of Zerovalent Nickel, Palladium, and Platinum Derivatives

Chemistry of Zerovalent Nickel, Palladium, and Platinum Derivatives

Polymerization of Methyl Methacrylate with Homogeneous Organopalladium/MMAO Systems

The crystal and molecular structure of the coordinatively unsaturated Ni(0) species Ni(PPh3)3

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The crystal and molecular structure of the coordinatively unsaturated Ni(0) species Ni(PPh₃)₃