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Tris(tri-o-tolylphosphite)nickel(0) is a nickel-based organophosphorus compound with the chemical formula [Ni(P(OC6H4CH3-o)3)3]. It is a homogeneous catalyst that plays a significant role in various chemical reactions, particularly in the field of organic synthesis. This complex is known for its stability and high catalytic activity, making it a valuable tool in the formation of carbon-carbon bonds, such as in cross-coupling reactions and olefin polymerization processes. The tris(tri-o-tolylphosphite) ligand provides a sterically hindered environment around the nickel center, which can influence the selectivity and reactivity of the catalyst. Its applications span across the pharmaceutical, agrochemical, and materials science industries, where it aids in the synthesis of complex molecules and advanced materials.

28829-00-7

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28829-00-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28829-00-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,8,2 and 9 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 28829-00:
(7*2)+(6*8)+(5*8)+(4*2)+(3*9)+(2*0)+(1*0)=137
137 % 10 = 7
So 28829-00-7 is a valid CAS Registry Number.

28829-00-7Relevant academic research and scientific papers

The Mechanism of Nickel-Catalyzed Ethylene Hydrocyanation. Reductive Elimination by an Associative Process

McKinney, Ronald J.,Roe, D. Christopher

, p. 5167 - 5173 (2007/10/02)

The complex (c2H4)L(CN)(C2H5)NiII has been identified at -40 deg C by 1H, 31P, and 13C NMR spectroscopy as the primary intermediate in the catalytic hydrocyanation of ethylene.Reaction of this intermediate with L causes reductive elimination of propanenitrile and produces (C2H4)L2Ni which reacts with ethylene and hydrogen cyanide to regenerate the intermediate.Measurements of second-order rate constants at -50 to -10 deg C result in ΔHexct=8.8 +/- 0.9 kcal/mol and ΔSexct=-34 +/- 4 eu (ΔGexct=16.7 +/- 0.1 kcal/mol at -40 deg C).At higher L concentrations, these nickel species are also in equilibrium with (C2H4)L3Ni, L4Ni, and HNi(CN)L3 which remove nickel from the productive catalytic cycle.Equilibrium constants relating these species and corresponding thermodynamic parameters have been determined.The rates of dissociation of L from L4Ni and HNi(CN)L3 have also been determined.The former reaction is very slow with ΔHexct=20.1 +/- 1.6 kcal/mol and ΔSexct=7 +/- 7 eu (ΔGexct=18.5 kcal/mol at -40 deg C) whereas the latter is about 1E3 faster with ΔHexct=18.8 +/- 2.7 kcal/mol and ΔSexct=17 +/- 10 eu (ΔGexct=14.8 kcal/mol at -40 deg C).

Formation of olefin complexes of Nickel(0). 5. Steric and electronic effects of phosphorus ligands

Tolman,Seidel,Gosser

, p. 1391 - 1396 (2008/10/08)

Spectrophotometric measurements by IR and vis/UV on solutions containing olefins, phosphorus ligands, and nickel(0) show that competition for coordination is strongly affected by both olefin structure and the steric and electronic properties of the phosph

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