Author
Steven M. F. Kennedy
Bio: Steven M. F. Kennedy is an academic researcher from Massey University. The author has contributed to research in topics: Imine & Denticity. The author has an hindex of 4, co-authored 4 publications receiving 42 citations.
Papers
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TL;DR: In this article, the P2N mixed donor ligand 2-(diphenylphosphino)-N-[2-(diphosphino)benzylidene]aniline (PNCHP) reacted with [Cr(CO)4(NBD)] and [M(CO]4(C5H11N)2] (M = Cr, Mo or W; NBD = NNB; C5H 11N = Piperidine; PNB = PNB); NBD ǫ = NBN; PN
Abstract: The ‘P2N’ mixed donor ligand 2-(diphenylphosphino)-N-[2-(diphenylphosphino)benzylidene]aniline (PNCHP) reacted with [Cr(CO)4(NBD)] and [M(CO)4(C5H11N)2] (M = Mo or W; NBD = norbornadiene; C5H11N = piperidine) to yield cis-[Cr(CO)4(PNCHP-κ2N,P)] and cis-[M(CO)4(PNCHP-κ2P,P′)] respectively. PNCHP behaves as a ‘P,N’ bidentate ligand when M is Cr and a ‘P,P’ bidentate ligand when M is Mo or W. Heating cis-[Cr(CO)4(PNCHP-κ2N,P)] or cis-[M(CO)4(PNCHP-κ2P,P′)] (M = Mo or W) in toluene affords the complexes mer-[M(CO)3(PNCHP-κ3P,N,P′)] (M = Cr, Mo or W). Reaction of PNCHP with [Mo(CO)3(CHT)] (CHT = 1,3,5-cycloheptatriene) in cold toluene yields fac-[Mo(CO)3(PNCHP-κ3P,N,P′)] which readily isomerises to mer-[Mo(CO)3(PNCHP-κ3P,N,P′)] in solution. PNCHP reacts with UV-irradiated tetrahydrofuran solutions of [M(CO)6] (M = Cr or W) to yield phosphorus bound co-ordination isomers of [M(CO)5(PNCHP-κ1P)]. The same reaction when carried out with one half equivalent of PNCHP yields the PNCHP bridged dinuclear species [{M(CO)5}2(PNCHP-κ2P,P′)]. The compounds have been characterised by spectroscopic means and the single crystal structures of cis-[Cr(CO)4(PNCHP-κ2N,P)], cis-[W(CO)4(PNCHP-κ2P,P′)], mer-[Mo(CO)3(PNCHP-κ3P,N,P′)] and [{W(CO)5}2(PNCHP-κ2P,P′)] determined. In addition, the isomerisation kinetics of fac- to mer-[Mo(CO)3(PNCHP-κ3P,N,P′)] has been studied to determine rate constants and thermodynamic activation parameters.
21 citations
TL;DR: The structure of PNCHP has been determined by single-crystal X-ray diffraction in this paper, showing that the extent of this non-planarity is influenced by the presence of a CH2Cl2 solvent of crystallisation.
8 citations
TL;DR: In this article, the triosmium clusters [Os 3 (CO) 11 (CH 3 CN) 2 ] and O(Os 3(CO) 8 (μ 2 -PNCP) were characterized by spectroscopic means and the structures of 1 ·CH 2 Cl 2, 4 ·1.5 CH 2 CL 2 and 5a established by single-crystal X-ray analyses.
8 citations
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TL;DR: A series of nickel(II) complexes were synthesized and characterized by elemental analysis, spectroscopy, and X-ray crystallography as discussed by the authors, and they exhibited considerably high activity (up to 1.34 × 106 g·mol-1(Ni)·h-1) of ethylene oligomerization.
89 citations
TL;DR: In this article, the crystal structures of five-and six-coordinate ruthenium(II) complexes containing imino-and aminophosphines have been determined by X-ray diffraction.
54 citations
TL;DR: The synthesis of Sn(IV)-complexed, Schiff base derivatives 1a-1l, prepared in one pot by the reaction of 2-amino-4-R-phenol (R = H, Me, Cl, NO2), 2-pyridinecarboxaldehyde, 2-picolinic acid and dimethyl-, dibutyl-, and diphenyltin oxides, is described in this article.
35 citations
TL;DR: In this paper, the reaction of N-benzylidene-2-(diphenylphosphino)benzenamine (2) with Ph2PLi yielded [Li{N{CH(Ph)PPh2}C6H4(PPh 2)-2]-2}] and that with PH2PCH2Li·TMEDA generated [Li[N{Ch(Ph)-CH2PPh(2)-CH 2Ph2Ph2] C6H 4(P Ph2)-2}
34 citations
TL;DR: In this paper, a series of cobalt complexes bearing N-containing diphosphine PNP ligands has been synthesized and characterized, and all the complexes have been employed to catalyze the polymerization of 1,3-butadiene, in combination with methylaluminoxane (MAO) or ethylaluminum sesquichloride (EASC) as the cocatalyst.
33 citations