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  • Open Access
    Authors: 
    Rosa Padilla; Verónica Salazar; Margarita Paneque; José G. Alvarado-Rodríguez; Joaquín Tamariz; Héctor Pacheco-Cuvas; Florencia Vattier;
    Publisher: American Chemical Society (ACS)

    4 páginas, 1 figura, 2 esquemas. We describe herein the formation of two metallacyclic derivatives, 4b and 5b, which contain a coordinated ketone functionality (from an α-keto ester metallacyclic substituent). An iridafuran, 6, that results from the reaction of TpMe2Ir(...

  • Open Access
    Authors: 
    Laura Ortega-Moreno; Riccardo Peloso; Joaquín López-Serrano; Javier Iglesias-Sigüenza; Celia Maya; Ernesto Carmona;
    Publisher: Wiley-VCH
    Country: Spain

    Complex [PtMe(PMeAr)] (1), which contains a tethered terphenyl phosphine (Ar =2,6-(2,6-PrCH)CH), reacts with [H(EtO)]BAr (BAr =B[3,5-(CF)CH] ) to give the solvent (S) complex [PtMe(S)(PMeAr)] (2⋅S). Although the solvent molecule is easily displaced by a Lewis base (e.g....

  • Open Access
    Authors: 
    Arián E. Roa; Verónica Salazar; Joaquín López-Serrano; Enrique Oñate; Margarita Paneque; Manuel L. Poveda;
    Publisher: American Chemical Society (ACS)

    The Ir(III) compound TpMe 2Ir[C(CO 2Me)= C(CO 2Me)C(CO 2Me)=C(CO 2Me)](OH 2) (1) reacts thermally with aliphatic aldehydes RC(O)H (R = Me, tBu) to lead to the decarbonylation products TpMe 2Ir[C(CO 2Me)=C- (CO 2Me)C(CO 2Me)=C(CO 2Me)](CO) (2) and RH. In turn, formaldehy...

  • Open Access
    Authors: 
    Margarita Paneque; Manuel L. Poveda; Nuria Rendón;
    Publisher: Wiley
    Country: Spain

    The TpMe2Ir moiety has proven to easily promote the formal oxidative addition reactions of unsaturated molecules, with or without concomitant formation of carbon–carbon bonds, to form metallacyclic species. The ring sizes may range between having 5- and 7 members, and t...

  • Open Access
    Authors: 
    Laura Ortega-Moreno; María Fernández-Espada; Juan J. Moreno; Carlos Navarro-Gilabert; Jesús Campos; Salvador Conejero; Joaquín López-Serrano; Celia Maya; Riccardo Peloso; Ernesto Carmona;
    Publisher: Pergamon Press

    A series of sterically demanding aryl phosphine ligands (L) bearing terphenyl substituents, PR2Ar′ (R = hydrocarbyl, Ar′ = 2,6-diarylphenyl radical) has been prepared and characterized. The stability of these ligands towards oxidation in the air has been tested, and the...

  • Open Access
    Authors: 
    Crispín Cristóbal; Silvia García-Rubín; Yohar A. Hernández; Joaquín López-Serrano; Margarita Paneque; Cristina M. Posadas; Manuel L. Poveda; Nuria Rendón; Eleuterio Álvarez;
    Publisher: American Chemical Society
    Country: Spain

    The reaction of TpMe2Ir(C2H4)2 (TpMe2 = hydrotris(3,5-dimethylpyrazolyl)borate) with 1 equiv of DMAD (DMAD = dimethyl acetylenedicarboxylate) and 1 equiv of an aromatic aldehyde cleanly yields iridafuran derivatives, characterized by spectroscopy and X-ray analysis. The...

  • Open Access
    Authors: 
    Jesús Campos; Ana Cristina Esqueda; Joaquín López-Serrano; Luis Sánchez; Fernando P. Cossío; Abel de Cózar; Eleuterio Álvarez; Celia Maya; Ernesto Carmona;
    Publisher: American Chemical Society

    3 páginas, 2 figuras, 1 tabla, 3 esquemas. The synthesis and structural characterization of a mixed-sandwich (η5-C5Me5)Rh(III) complex of the cyclometalated phosphine PMeXyl2 (Xyl = 2,6-C6H3Me2) with unusual κ4-P,C,C′,C′′ coordination (compound 1-BArf; BArf = B(3,5-C6H3...

  • Open Access English
    Authors: 
    Jesús Campos; Eleuterio Álvarez; Ernesto Carmona;
    Publisher: Royal Society of Chemistry (UK)
    Country: Spain

    Reaction of the Ir(III) dimer [(η5-C5Me5)IrCl2]2 with PMeXyl2 (Xyl = 2,6-C6H3Me2), in the presence of the poorly coordinating base 2,2,6,6-tetramethyl piperidine, gives a chloride complex 1-Cl, resulting from hydrogen chloride elimination involving one of the phosphine ...

  • Open Access
    Authors: 
    Andrea Rossin; Giovanni Bottari; Ana M. Lozano-Vila; Margarita Paneque; Maurizio Peruzzini; Andrea Rossi; Fabrizio Zanobini;
    Publisher: Royal Society of Chemistry (Great Britain)
    Countries: Spain, Italy

    Catalytic dehydrogenation of ammonia-borane (NH3·BH 3, AB) and dimethylamine borane (NHMe2·BH 3, DMAB) by the PdII complex [(tBuPCP)Pd(H 2O)]PF6 [tBuPCP = 2,6-C6H 3(CH2PtBu2)2] leads to oligomerization and formation of spent fuels of general formula cyclo-[BH 2-NR2]n (n...

  • Open Access
    Authors: 
    Crispín Cristóbal; Laura L. Santos; Rubén Gutierrez-Gonzalez; Eleuterio Álvarez; Margarita Paneque; Manuel L. Poveda;
    Publisher: Wiley
    Country: Spain

    The IrIII compound [TpMe2Ir(C6H5)2(N2)] (1) [TpMe2 = hydridotris(3,5‐dimethylpyrazolyl)borate] reacts with 1‐hexene, propene, α‐methylstyrene, and 2,3‐dimethylbutadiene to yield organometallic products that derive from allylic C–H activations (complexes 3 from 1‐hexene,...