27427-47-0

Upstream product

• 14264-16-5 bis(triphenylphosphine)nickel(II) chloride 
• 22031-12-5 [2-((diphenylphospino)methyl)-2-methyl-1,3-propanediyl]bis[diphenylphosphine] 
• 83864-14-6 nickel dichloride 

Downstream Products

• 37726-31-1 chloro[1,1,1-tris(diphenylphosphinomethyl)ethane]nickel(I) 
• 118083-99-1 ((triphos)NiCl)(ClO₄) 
• 956226-21-4 [Ni(1,1,1-tris[(diphenylphosphino)methyl]ethane)(cystamine)]PF₆ 
• 871482-05-2 [(1,1,1-tris(diphenylphosphinomethyl)ethane)Ni(η2-H4)] 

Relevant academic research and scientific papers

Spontaneous Si-C bond cleavage in (TriphosSi)-nickel complexes

Herein, we report on the versatile reactions of CH3C(CH2PPh2)3 as well as CH3Si(CH2PPh2)3 derived Ni-complexes. While Ni[CH3C(CH2PPh2)

Modulating sonogashira cross-coupling reactivity in four-coordinate nickel complexes by using geometric control

Herein, we present the synthesis of nickel complexes with tripodal phosphine ligands, CH3Si(CH2PPh2)3 and CH3C(CH2PPh2)3, and their application as catalysts in Sonogas

Nickel-cysteine binding supported by phosphine chelates

The effect of chelating phosphines was tested on the structure and pH-dependent stability of nickel-cysteine binding. (1,2-Bis(diphenylphosphino) ethane (dppe) and 1,1,1-tris[(diphenylphosphino)methyl]ethane (triphos) were used with three different cysteine derivatives (L-cysteine, Cys; L-cysteine ethyl ester, CysEt; cystamine, CysAm) to prepare complexes of the form (dppe)NiCysRn+ and (triphos)NiCysRn+ (n = 0 for Cys; n = 1 for CysEt and CysAm). Similar 31P {1H} NMR spectra for all (dppe)NiCysRn+ confirmed their square-planar P2NiSN coordination spheres. The structure of [(dppe)NiCysAm]PF6 was also confirmed by single-crystal X-ray diffraction methods. The (triphos)- NiCysAm+ and (triphos)NiCysEt+ complexes were fluxional at room temperature by 31P NMR. Upon cooling to -80°C, all gave spectra consistent with a P2NiSN coordination sphere with the third phosphorus uncoordinated. Temperature-dependent 31P NMR spectra showed that a trans P-Ni-S π interaction controlled the scrambling of the coordinated triphos. In aqueous media, (dppe)NiCys was protonated at pH ～ 4-5, leading to possible formation of a nickel-cysteinethiol and eventual cysteine loss at pH - = hydrotris(3,5-dimethylpyrazolyl)borate. Importantly, results with these heterogeneous systems demonstrated the selectivity of these nickel centers for cysteine over methionine and serine and most specifically for N-terminus cysteine. The role of Ni-S π bonding in nickel-cysteine geometries will be discussed, including how these results suggest a mechanism for the movement of electron density from nickel onto the backbone of coordinated cysteine.

[(Triphos)Ni(η2-BH4)]: An unusual nickel(I) borohydride complex

Reduction of [(triphos)NiCl2] (1) with an excess of NaBH 4 in THF produces the paramagnetic Ni(I) complex [(triphos) Ni(η2-BH4)] (2). X-ray crystallography shows 1 to be a square-planar Ni(II) species in which the phosphine ligand is bidentate, whereas 2 has pseudotetrahedral geometry at the Ni(I) center, with a tridentate phosphine and the borohydride ligand occupying a single coordination site. Density functional theory calculations show the unpaired electron in 2 to reside in an orbital located mainly on the Ni atom.

Nickel Thioether Chemistry: Synthesis, Structures and Electrochemistry of Five-co-ordinate Nickel(II) Complexes of aneS3. Crystal Structures of aneS3)(dppm)>2, aneS3)(dcpe)>2*1.25MeCN and aneS3)(tdpme)>2 aneS3 = 1,4,7-Trithiacyclononane ...>

Reaction of >L-L = Ph2PCH2PPh2 (dppm), R2PCH2CH2PR2 , cis-Ph2PCH=CHPPh2 (dppv), Ph2PCH2CH2CH2PPh2 (dppp) or MeC(CH2PPh2)3 (tdpme)> with 1 molar equivalent of 1,4,7-trithiacyclononane(aneS3) afforded the complex cations aneS3)(L-L)>(2+).The crystal structures of aneS3)(dppm)>2, aneS3)(dcpe)>2*1.25MeCN and aneS3)(tdpme)>2 showed five-co-ordinate complexes with distorted square-pyramidal geometries about the nickel(II) centres with S-donors of aneS3 occupying two basal and the apical position, Ni-Sapical 2.40-2.65 Angstroem, Ni-Sbasal 2.22-2.27 Angstroem, Ni-Pbasal 2.17-2.22 Angstroem.The complex aneS3)(dppm)>2 crystallises in triclinic space group P, a = 10.9748(25), b = 13.9702(20), c = 15.7688(24) Angstroem, α = 80.071(7), β = 70.817(8), γ = 76.441(8) deg, Dc = 1.374 g cm-3, Z = 2; aneS3)(dcpe)>2*1.25MeCN crystallises in triclinic space group P, a = 12.432(8), b = 13.382(4), c = 15.070(6) Angstroem, α = 86.83(2), β = 70.47(2), γ = 77.28(2) deg, Dc = 1.445 g cm-3, Z = 2; aneS3)(tdpme)>2 crystallises in monoclinic space group Cc, a = 10.7597(16), b = 37.399(5), c = 13.104(3) Angstroem, β = 103.746(11) deg, Dc = 1.491 g cm-3, Z = 4.Cyclic voltammetry of the complexes aneS3)(L-L)>2 in MeCN (0.1 mol dm-3 NBu4PF6) at 293 K at platinum electrodes showed one chemically reversible and one quasi-reversible one-electron reduction at 1E1/2 = -0.77 to -1.16 V, ΔEp = 61-92 mV, 2E1/2 = -1.31 to -1.93 V vs. ferrocene-ferrocenium.On the basis of ESR and electronic spectroscopy, these reduction products are asiigned as pyramidal d9 nickel(I) aneS3)(L-L)>(1+) with binding of both P-donors retained, and tetrahedral 210 nickel(0) aneS3)(L-L)>(0) species respectively.The reaction of aneS3)(L-L)(1+) with CO in MeCN is discussed.