Nickel(II) complexes of heterodichalcogenido and monochalcogenido imidodiphosphinate ligands : AACVD synthesis of nickel ditelluride

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Robertson, Stuart D. and Chivers, Tristram and Akhtar, Javeed and Afzaal, Mohammad and O'Brien, Paul (2008) Nickel(II) complexes of heterodichalcogenido and monochalcogenido imidodiphosphinate ligands : AACVD synthesis of nickel ditelluride. Dalton Transactions (48). pp. 7004-7011. ISSN 1472-7773 (https://doi.org/10.1039/b814065k)

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Abstract

The reaction of two equivalents of (TMEDA) Li[((EPPr2)-Pr-i)((TePPr2)-Pr-i)N] (E = S, Se) with NiBr2(DME) in THF at 23 degrees C yields homoleptic complexes of heterodichalcogenido PNP ligands Ni[((EPPr2)-Pr-i)((TePPr2)-Pr-i)N](2) (2, E = S; 3, E = Se). Similarly, the complexes Ni[((PPr2)-Pr-i)((EPPr2)-Pr-i)N](2) (4, E = Se; 5, E = Te) are obtained by in situ deprotonation of the neutral monochalcogenides E=(PPr2NP)-Pr-i(H)Pr-i(2) (E = Se, Te) with (BuLi)-Bu-n in THF at -78 degrees C followed by addition of NiBr2(DME). The complexes 2-5 have been characterised by multinuclear (H-1, P-31, Se-77 and Te-125) NMR spectroscopy in solution and by X-ray crystallography in the solid state, the results of which show that they all exist as the square planar, trans isomers. Aerosol-assisted chemical vapour deposition (AACVD) of Ni[((SePPr2)-Pr-i)((TePPr2)-Pr-i)N](2) yields crystalline Ni0.51Te films at 450-500 degrees C, which were analysed by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS).

ORCID iDs

Robertson, Stuart D. ORCID logoORCID: https://orcid.org/0000-0002-9330-8770, Chivers, Tristram, Akhtar, Javeed, Afzaal, Mohammad and O'Brien, Paul;
  • Item type:Article
    ID code:33861
    Dates:
    Date
    Event
    2008
    Published
    31 October 2008
    Published Online
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:29 Sep 2011 13:37
    Last modified:14 Dec 2024 20:49
    URI:https://strathprints.strath.ac.uk/id/eprint/33861
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