138917-09-6Relevant academic research and scientific papers
Electrocatalytic Hydrogen Evolution and Hydrogen Oxidation with a Ni(PS)2 Complex
Jain, Rahul,Mashuta, Mark S.,Buchanan, Robert M.,Grapperhaus, Craig A.
, p. 3714 - 3719 (2017/08/30)
Tetra-coordinate NiII and ZnII complexes employing the PS chelates 2-(diphenylphosphanyl)benzenethiol (HL1) and 2-(diisopropylphosphanyl)benzenethiol (HL2) have been synthesized and characterized by spectroscopic, structural, and electrochemical methods. All complexes were screened for electrocatalytic activity for hydrogen evolution with acetic acid and hydrochloric acid and hydrogen oxidation in the presence of triethylamine. The nickel complex Ni(L1)2 (1) was found to reduce protons from external acids to generate hydrogen with a turnover frequency of 140 s–1 at an overpotential of 1.1 V and cleave dihydrogen using redox active base triethylamine (Et3N) with a turnover frequency of 23 s–1 at an overpotential of 0.33 V. Ni(L2)2 (3) was also found to be an active catalyst for dihydrogen oxidation, but inefficient for proton reduction due to inaccessible Ni (II/I) reduction in the potential window. Zn(L1)2 (2) and Zn(L2)2 (4) complexes were found to be inadequate for their electrocatalytic behaviour towards both the reactions.
Reaction of a heterotopic P,SAs ligand with group 10 metal(ii) complexes: As-S bond cleavage and the formation of two unusual trinuclear structural isomers for Pd and Pt
Sarosi, Imola,Hildebrand, Alexandra,Loennecke, Peter,Silaghi-Dumitrescu, Luminia,Hey-Hawkins, Evamarie
, p. 5326 - 5333 (2012/05/20)
The synthesis of the heterotopic P,SAs ligand, 1-Ph2AsSC 6H4-2-PPh2 (1) and its reaction with [PdCl 2(cod)], [PtI2(cod)] (cod = 1,5-cyclooctadiene) and NiCl2·6H2O is reported. Cleavage of the As-S bond of 1 and coordination of the resulting phosphanylthiolato ligand (SC 6H4-2-PPh2)- (SC6H 4-2-PPh2 = P,S) was observed with formation of [M(P,S)2] (M = Ni, Pd, Pt). In the case of Pd and Pt, not only the mononuclear complexes [M(P,S)2] formed, but also the trimers of [MX(P,S)] ([MX{(μ-S-SC6H4-2-PPh2)- κ2S,P}]3 [M = Pd, X = Cl (2) and M = Pt, X = I (4)]). Formation of 2 and 4 was preceded by the trinuclear isomeric intermediates [(cis-M{(μ-S-SC6H4-2-PPh 2)-κ2S,P}2)-MX2-MX{(μ-S- SC6H4-2-PPh2)-κ2S,P}] [M = Pd, X = Cl (3) and M = Pt, X = I (5)]. The crystal structures of 1-5 and a possible reaction mechanism that leads to 2 and 4 are presented.
Syntheses and properties of molecular nickel(II) hydride, methyl, and nickel(I) complexes supported by trimethylphosphane and (2-diphenylphosphanyl)thiophenolato and -naphtholato ligands
Kraikivskii, Peter B.,Frey, Markus,Bennour, Hamdi A.,Gembus, Armin,Hauptmann, Ralf,Svoboda, Ingrid,Fuess, Hartmut,Saraev, Vitaly V.,Klein, Hans-Friedrich
, p. 1869 - 1876 (2009/08/14)
(2-Diphenylphosphanyl)thiophenol (P^pSH) or (3-diphenylphosphanyl)-2-thionaphthol (P^nSH) react with Ni(PMe3)4 to form NiH(P^pS)(PMe3)2 (1) or NiH(P^nS)(PMe3)2 (2). 1,3-Bis(diphenylphosphanyl)propane (P^P) replaces the monodentate phosphane ligands to give NiH(P^pS)(P^P) (3). NiMe(OMe)(PMe3) or NiMe2(PMe3)3 react with P^pSH to form NiMe(P^pS)(PMe3) (4) and NiMe(P^pS)(PMe3)2 (5), respectively, and P^nSH affords NiMe(P^nS)(PMe3)2 (6), NiMe(P^nS)(PMe3) (7). Dissociation of PMe3 ligands induces transformation of 1 to Ni(P^pS)(PMe3)2 (8) and Ni(P^pS)2. Crystal and molecular structures are given for 1, 5-8, and dynamic solution spectra (NMR, EPR) are discussed.
Insertion of alkynes into Ni-H bonds: Synthesis of novel vinyl nickel(II) and dinuclear vinyl nickel(II) complexes containing a [P, S]-ligand
She, Lei,Li, Xiaoyan,Sun, Hongjian,Ding, Jun,Frey, Markus,Klein, Hans-Friedrich
, p. 566 - 570 (2008/10/09)
Reactions of alkynes with nickel hydride complexes bearing a [P, S]-ligand and supported by trimethylphosphine were investigated. Tetracoordinate vinyl nickel(II) complexes 3, 5, and 6 with square-monoinsertionplanar geometry were obtained by reacting phenylacetylene, trimethylsilylacetylene, and 1-hexyne with the hydrido nickel complex 1. Reaction of 1,4-bis(trimethylsilylethynyl)benzene with complex 1 proceeds as a monoinsertion and afforded complex 7, while reaction of 1,4-bis(ethynyl)benzene with 1 leads to the dinuclear vinyl nickel(II) complex 8.
Transmetallation reactions of [Sn(R)2(Ph2 PC6H4-2-S)2] with metal complexes of the Group 10 Stereoselective synthesis of cis-[M(Ph2PC6H4-2-S)2] (M=Ni, Pd, Pt)
Canseco-González, Daniel,Gómez-Benítez, Valente,Hernández-Ortega, Simón,Toscano, Rubén A.,Morales-Morales, David
, p. 101 - 109 (2007/10/03)
The complexes cis-[M(Ph2PC6H4-2-S) 2] M=Ni, Pd, Pt were stereoselectively synthesized by transmetallation reactions of [M(Cl)2(NCC6 H5)2] M=Pd, Pt or NiCl2·6H2O with [Sn(R)2(Ph2PC6H4-2-S) 2] R=Ph, nBu or tBu. The conformation of the Pd and Pt derivatives being unequivocally confirmed by single crystal X-ray diffraction studies showing both metal centers to be into a slightly distorted square planar environment, the main distortion being due to the steric hindrance caused by the aromatic rings in the phosphine moiety.
Synthesis and characterisation of cobalt and nickel compounds with phosphinothiol ligands. Crystal and molecular structures of [Co{ {2- (Ph2P)-6- (Me3Si)C6H3S)} }3], [Ni{ {2- (Ph2P)-6- (Me<
Perez-Lourido,Romero,Garcia-Vazquez,Sousa,Zubieta,Maresca
, p. 4457 - 4464 (2008/10/09)
Theelectrochemical oxidation of anodic metal (cobalt or nickel) in an acetonitrile solution of phosphinothiol ligands, 2- (Ph2P)C6H4SH, 2- (Ph2P)-6- (SiMe3)C6H3SH, 2- (Ph2/
Light induced sulfur-dealkylation of phosphino-thioether nickel(0) complexes
Kim, Jang Sub,Reibenspies, Joseph H.,Darensbourg, Marcetta Y.
, p. 283 - 294 (2008/10/08)
The observation of homolytic S-CH3 bond cleavage in (Ph2P(o-C6H4)SCH3) 2Ni0 under photochemical conditions has prompted further investigation of nickel(0) complexes and their stability. Tetradentate P2S′2 donor ligands (S′ = thioether type S donor) with aromatic rings incorporated into the P to S links, Ph2P(o-C6H4)S(CH2) 3S(o-C6H4)PPh2 (arom-PSSP), or the S to S links, Ph2P(CH2)2SCH2(o-C6H 4) CH2S (CH2)2PPh2 (PS-xy-SP), have been used to form four-coordinate, square planar nickel (II) complexes, [(arom-PSSP)Ni] (BF4)2 (2) and [(PS-xy-SP)Ni] (BF4)2 (3). The bidentate and tetradentate ligands, Ph2P(o-C6H4)SCH2CH3 (arom-PSEt) and Ph2P(CH2)2S(CH2) 3S(CH2)2PPh2 (PSSP), give similar complexes, [(arom-PSEt)2Ni] (BF4)2 (1) and [(PSSP)Ni] (BF4)2 (4), respectively. Cyclic voltammograms of the NiII complexes in CH3CN show two reversible redox events assigned to NiII/I and NiI/0. The one-electron reduction product produced by stoichiometric amounts of Cp2Co can be characterized by EPR. At 100 K rhombic signals show hyperfine coupling to two phosphorus atoms. Complete bulk chemical reduction of complexes 1, 2, 3 and 4 with Na/Hg amalgam provided the corresponding nickel(0) complexes 1R, 2R, 3R and 4R which were isolated as red solutions or solids and characterized by magnetic resonance properties and reaction products. Photolysis of these nickel(0) complexes leads to S-dealkylation to produce alkyl radicals and dithiolate nickel(II) complexes. Complex 3 crystallized in the monoclinic space group P21/c with a = 20.740(5), b = 9.879(3), c = 17.801(4) ?, β = 92.59(2)°, V = 3644(2) ?3 and Z=4; complex 4: P21 with a = 13.815(4), b = 13.815(4), c = 15.457(5) ?, β = 104.89(2)°, V = 3365.4(14) ?3 and Z = 4.
Characteristics of nickel(0), nickel(I), and nickel(II) in phosphino thioether complexes: Molecular structure and S-dealkylation of (Ph2P(o-C6H4)SCH3)2Ni0
Sub Kim,Reibenspies,Darensbourg
, p. 4115 - 4123 (2007/10/03)
The molecular structure of a nickel(0) complex with P,S-donor atom ligands has been characterized by X-ray crystallography. Complex 1, (Ph2P(o-C6H4)SCH3)2Ni0, prepared by Na/Hg amalgam redu
