Yazar "Ang, Wee Han" seçeneğine göre listele

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  • Küçük Resim
    Öğe
    Application of N,N-bis(diphenylphosphino) aniline palladium(II) complexes as pre-catalysts in Heck coupling reactions
    (Wiley, 2007) Gümgüm, Bahattin; Biricik, Nermin; Durap, Feyyaz; Özdemir, İsmail; Guerbuez, Nevin; Ang, Wee Han; Dyson, Paul J.; 0000-0003-0899-1948
    Palladium(II) complexes with N,N-bis(diphenylphosphino)aniline ligands catalyse the Heck reaction between styrene and aryl bromides, affording stilbenes in good yield. The structures of two of the complexes used as pre-catalysts have been determined by single-crystal X-ray diffraction. Copyright (c) 2007 John Wiley & Sons, Ltd.
  • [ X ]
    Öğe
    Synthesis and characterizations of N,N-bis(diphenylphosphino)ethylaniline derivatives and X-ray crystal structure of palladium (II), platinum (II) complexes
    (Pergamon-Elsevier Science Ltd, 2008) Durap, Feyyaz; Biricik, Nermin; Guemguem, Bahattin; Oezkar, Saim; Ang, Wee Han; Fei, Zhaofu; Scopelliti, Rosario
    N,N-Bis(diphenylphosphino)ethylaniline compounds, [Ph2P](2)N-C6H4-C2H5, with ethyl groups at the ortho- and para-positions have been synthesized. Oxidation of the aminophosphines with hydrogen peroxide, elemental sulfur and selenium gave the corresponding oxides, sulfides and selenides [Ph2P(E)](2)N-C6H4-C2H5 (E = O, S, Se). Complexes [MCl2{(Ph2P)(2)N-C6H4-(C2H5)}] (M = Pd, Pt) and [Cu{(Ph2P)(2)N-C6H4-C2H5)(2)]PF6 were obtained by the reaction of NN-bis(diphenylphosphino)ethylaniline with [MCl2(COD)] (M = Pd, Pt) and (Cu(MeCN)(4)]PF6. The new compounds were characterized by NMR, IR spectroscopy and microanalysis. In addition, representative solid-state structures of the palladium and platinum complexes were determined using single crystal X-ray diffraction analyses. (C) 2007 Elsevier Ltd. All rights reserved.
  • [ X ]
    Öğe
    Synthesis of new aminophosphine complexes and their catalytic activities in C-C coupling reactions
    (Elsevier Science Sa, 2008) Biricik, Nermin; Durap, Feyyaz; Kayan, Cezmi; Guemguema, Bahattin; Guerbuez, Nevin; Oezdemir, Ismail; Ang, Wee Han
    Two new aminophosphines, benzyl-N(Ph2P)(2) and 2-picolyl-N(Ph2P)(2), have been synthesized. Oxidation of the aminophosphines with either hydrogen peroxide, elemental sulfur and selenium gave the corresponding oxides, sulfides and selenides benzyl-N(Ph2P=E)(2) and 2-picolyl-N(Ph2P=E)(2), where E = O, S, or Se. Complexes [benzyl-N(Ph2P)(2)]MCl2 and [2-picolyl-N(Ph2P)(2)]MCl2, where M = Pd, Pt, were obtained by the reaction of the aminophosphines with MCl2(cod). The new compounds were characterised by NMR, IR spectroscopy and microanalysis. Furthermore, representative solid-state structures of the palladium and platinum complexes were determined using single crystal X-ray diffraction analysis. The palladium complexes were further investigated as potential catalysts in C-C coupling reactions. (c) 2008 Elsevier B. V. All rights reserved.