14917-13-6Relevant academic research and scientific papers
The infrared and Raman spectra of a triphenylphosphine derivative of Ni(CO)4
Edgell, Walter F.,Dunkle, Michael P.
, p. 1629 - 1636 (1965)
The infrared and Raman spectra of Ni(CO)3P(C6H5)3 and P(C6H5)3 in cyclohexane were obtained for the identification of the modes of vibration localized in the PNi(CO)3 group of Ni(CO)3P(C6H5)3. The Raman spectra were obtained by means of an electrodeless mercury arc powered by high-frequency radiation. The principal Raman exciting line was the 4358 ?. Hg line. The spectra are interpreted in terms of C3v symmetry for the PNi(CO)3 group and frequencies are assigned to the fundamentals. The nature of the bonding is discussed from a molecular orbital point of view and compared with that in Ni(CO)4. The C-O stretching frequencies permit one to estimate the π*CO participation index as 0.28 compared with a PI value 0.19 for a CO in Ni(CO)4. Thus, there is an increase of about 0.5 electron in the π*CO orbitals of the Ni(CO)3 moiety on passing from Ni(CO)4 to Ni(CO)3P(C6H5)3, much of which results from a substantial reduction in the charge back-transferred into the π acceptor orbitals of the P(C6H5)3 ligand from the value for CO in Ni(CO)4.
Expanding the phosphorus-carbon analogy: Formation of an unprecedented 5-phosphasemibullvalene derivative
Rigo, Massimo,Weber, Manuela,Müller, Christian
, p. 7090 - 7093 (2016)
We could access for the first time a 5-phosphasemibullvalene derivative via quantitative and selective photochemical di-π-methane rearrangement from the corresponding phosphabarrelene. Due to the striking analogy between phosphorus and carbon, this hitherto unknown transformation of vinyl-phosphorus species provides the possibility to prepare novel, chiral and conformationally rigid organophosphorus cage compounds in a straightforward manner.
Kinetics and Mechanism of the Oxidative Addition of Cyanogen to
Basato, Marino,Corain, Benedetto,Favero, Giancarlo,Rosano, Pietro
, p. 2513 - 2516 (1984)
The complex , (1), reacts with C2N2 in toluene, at 30.0-44.5 deg C, to give trans-, (2), which crystallizes as a clathrate containing 1 mol of C2N2.The reaction mechanism postulated involves preliminary carbon monoxide dissociation from complex (1), followed by competitive cyanogen attack on the three-co-ordinate intermediate and subsequent oxidative addition.
Synthesis, Structure and Nickel Carbonyl Complexes of Dialkylterphenyl Phosphines
Marín, Mario,Moreno, Juan J.,Navarro-Gilabert, Carlos,álvarez, Eleuterio,Maya, Celia,Peloso, Riccardo,Nicasio, M. Carmen,Carmona, Ernesto
, p. 260 - 272 (2019)
The experimental and computational characterization of a series of dialkylterphenyl phosphines, PR2Ar′ is described. The new P-donors comprise five compounds of general formula PR2ArDtpb2 (R=Me, Et, iPr, c-C5H9 and c-C6H11); ArDtpb2 = 2,6-C6H3-(3,5-C6H3-(CMe3)2)2), and another five PR2Ar′ phosphines containing the bulky alkyl groups iPr, c-C5H9 or c-C6H11, in combination with Ar′=ArXyl2, Ar Xyl'2, or Ar ph2 (L1–L10). Steric and electronic parameters have been determined computationally and from IR and X-ray data obtained for the phosphines and for some derivatives, including tricarbonyl and dicarbonyl nickel complexes, Ni(CO)3(PR2Ar′) and Ni(CO)2(PR2Ar′). In the solid state, the free phosphines PR2Ar′ adopt one of the three possible structures formally related by rotation around the Cipso?P bond. Details on their relative energies and on the influence of the free phosphine structure on its coordination chemistry towards Ni(CO)n (n = 2, 3) fragments has been obtained by experimental and computational methods.
The reactivity of a nucleophilic nickel acylate complex
Hermanson, James R.,Figley, Timothy M.,Seibert, Anna L.,Pinhas, Allan R.
, p. 2061 - 2064 (2008/09/19)
The reactivity of a nucleophilic nickel acylate complex with a tungsten carbene complex, Fe(CO)5, Cr(CO)6, PPh3, and CO was investigated. With the tungsten carbene complex, a methyl transfer occurred. With the metal carbonyl complexes, the acylate group on the nickel and a carbonyl on the iron or chromium traded places. With the PPh3 and CO, the acylate anion was replaced by the phosphine or CO ligand.
Spectral quantum beating in mixed frequency/time-domain coherent multidimensional spectroscopy
Pakoulev, Andrei V.,Rickard, Mark A.,Mathew, Nathan A.,Kornau, Kathryn M.,Wright, John C.
, p. 6999 - 7005 (2008/10/09)
Coherent multidimensional spectroscopy performed in the mixed frequency/time domain exhibits both temporal and spectral quantum beating when two quantum states are simultaneously excited. The excitation of both quantum states can occur because either the spectral width of the states or the excitation pulse exceeds the frequency separation of the quantum states. The quantum beating appears as a line that broadens and splits into two peaks and then recombines as the time delay between excitation pulses increases. The splitting depends on the spectral width of the excitation pulses. We observe the spectral quantum beating between the two nearly degenerate asymmetric carbonyl stretch modes in a nickel tricarbonyl chelate using the nonrephasing, ground state bleaching coherence pathway in triply vibrationally enhanced four-wave mixing as the time delay between the first two excitation pulses changes.
Reaction of C(NMe2)4 with Ni(CO)4 - syntheses and structures of [C(NMe2)3][(CO)3NiC(O)NMe2], [C(NMe2)3]2[Ni5(CO)12], and[C(
Petz
, p. 2274 - 2280 (2008/10/08)
The reaction of C(NMe2)4 with Ni(CO)4 in THF produces the carbamoyl complex [C(NMe2)3][(CO)3NiC(O)-NMe2] (1); side products are the purple cluster compound [C(NMe2)su
Functionally substituted monocyclopentadienyl compounds. Formation of and derivatives with other phosphines. X-Ray crystal structure of
Ballester, L.,Perez, S.,Gutierrez, A.,Perpinan, M. F.,Gutierrez-Puebla, E.,et al.
, p. 411 - 420 (2007/10/02)
reacts with (X = Cl, Br, I, CN, SCN) to give monocyclopentadienyl complexes.The reactions of these complexes with tertiary phosphines or carbon monoxide are described.The crystal structure of has been determined, and shows the nickel atom to be in a pseudo-pentacoordinate environment.
Reaction of nickel polymerization catalysts with carbon monoxide
Klabunde, U.,Tulip, T. H.,Roe, D. C.,Ittel, S. D.
, p. 141 - 156 (2007/10/02)
The nickel compound, Ni(Ph2PCH=C(Ph)O)(PEt3)Ph, is a catalyst precursor for ethylene homopolymerization and the alternating copolymerization of ethylene with carbon monoxide.In the absence of ethylene, CO is a catalyst poison.In an effort to understand the mechanisms of these reactions, we have investigated the chemistry of the compounds with pure CO.The crystal structures of the catalyst precursor and the benzoyl product resulting from the insertion of CO into the Ni-Ph bond are presented.Several zero-valent complexes of Ni and an organic product based on the coupling of the chelating ligand and the benzoyl group have been isolated and characterized.A brief description of the polymerization mechanism is presented.
HETERONUCLEAR COMPLEXES CONTAINING GROUP 6 TRANSITION METALS; CHEMICAL, SPECTROSCOPIC, AND THEORETICAL STUDIES ON SOME BINUCLEAR COMPLEXES AND THE X-RAY CRYSTAL STRUCTURE DETERMINATION OF (WNi(CO)3(PPh3)2(Η5-C5H5))
Carlton, Laurence,Lindsell, W. Edward,McCullough, Kevin J.,Preston, Peter N.
, p. 2741 - 2750 (2007/10/02)
Reactions of anions (M(CO)3(η5-C5H5))(-) with (NiCl2(PPh3)2) in tetrahydrofuran afford paramagnetic, bimetallic complexes (MNi(CO)3(PPh3)2(η5-C5H5)) (M=Mo (1) or W(2), and a less stable chromium analogue (M=Cr(3)), as green crystalline solids.Ready cleavage of these bimetallic complexes occurs, as on reaction with CO or Ph2PCH2Ch2PPh2, and related reactions of (WRh(CO)3(PPh3)2(η5-C5H5)) (5) are also presented.An X-ray diffraction study of crystalline (2) (monoclinic, space group P21/c, a=17.873(9), b=10.156(6), c=21.249(7) angstroem, β=105.05(3) deg, Z=4) establishes the structure ((η5-C5H5)(OC)W(μ-CO)2Ni(PPh3)2 (R=0.062, R'=0.087) with semibridging CO groups and a relatively short W-Ni separation (2.574(3) angstroem).Spectroscopic studies on complexes (1)-(3) include analyses of e.s.r. spectra both in solution, where coupling to inequivalent 31P nuclei is observed, and in the solid state.Comparative extended-Hueckel molecular orbital studies on model complexes (MM'(CO)3(PH3)2(η5-C5H5)) (M=Mo, M'=Rh; M=W, M'=Ni or Cu (two conformers)) are discussed and the bonding analysed in terms of both direct M-M' and semibridging M(μ-CO)M' interactions.Cyclic voltammetry of complexes (2), (5), and (WCu(CO)3(PPh3)2(η5-C5H5)) is reported and simple redox processes occur for (2) and (5).
