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Monomer–Dimer Divergent Behavior toward DNA in a Half-Sandwich Ruthenium(II) Aqua Complex. Antiproliferative Biphasic Activity

29-Dec-2014 | Natalia Busto; Marta Martínez-Alonso; José M. Leal; Ana M. Rodríguez; Fernando Domínguez; Ma Isabel Acuña; Gustavo E ..., Organometallics, 2014

The complex [(η6-p-cymene)Ru(OH2)(κ2-N,N-HL1)](OTf)2 (HL1 = 2-pyridin-2-yl-1H-benzimidazole), [2c](OTf)2, undergoes easy deprotonation of the N–H group at physiological pH, producing [(η6-p-cymene)Ru(OH2)(κ2-N,N-L1)]+, [2c′]+, prone to dimerization both in solution and in the solid state. X-ray ...


A Molecular Complex with a Formally Neutral Iron Germanide Motif (Fe2Ge2)

24-Dec-2014 | Anukul Jana; Volker Huch; Henry S. Rzepa; David Scheschkewitz, Organometallics, 2014

We report the synthesis and isolation of a stable complex containing the formally neutral Fe2Ge2 motif, which is stabilized by the coordination of an N-heterocyclic carbene to the germanium and of carbon monoxide to the iron center. [(NHCiPr2Me2)GeFe(CO)4]2 is obtained by reduction of the ...


Functionalized Ruthenium Dialkynyl Complexes with High Second-Order Nonlinear Optical Properties and Good Potential as Dye Sensitizers for Solar Cells

23-Dec-2014 | Filippo Nisic; Alessia Colombo; Claudia Dragonetti; Eleonora Garoni; Daniele Marinotto; Stefania Righetto; Filippo D ..., Organometallics, 2014

Various dipolar π-delocalized Ru(II) dialkynyl complexes were prepared and characterized. Their second-order nonlinear optical (NLO) properties were investigated by the electric-field-induced second harmonic generation (EFISH) technique working in CH2Cl2 solution with an incident wavelength of ...


Hydrolysis and Methanolysis of Silanes Catalyzed by Iridium(III) Bis-N-Heterocyclic Carbene Complexes: Influence of the Wingtip Groups

23-Dec-2014 | Mélanie Aliaga-Lavrijsen; Manuel Iglesias; Andrea Cebollada; Karin Garcés; Nestor Garcı́a; Pablo J. Sanz Miguel; Fra ..., Organometallics, 2014

New [Ir(CH3CN)2(I)2{κC,C′-bis(NHC)}]BF4 complexes featuring bis-NHC ligands with a methylene bridge and different N substitution (−CH2CH2CH2CH3 and −CH2CH2OPh) were synthesized. NMR studies and X-ray diffraction structures evidenced that the wingtip group −CH2CH2OPh presents a hemilabile behavior ...


[H3–nFe4(CO)12(IrCOD)]n− (n = 1, 2) and [H2Fe3(CO)10(IrCOD)]− Bimetallic Fe–Ir Hydride Carbonyl Clusters

22-Dec-2014 | Marco Bortoluzzi; Iacopo Ciabatti; Cristina Femoni; Mohammad Hayatifar; Maria Carmela Iapalucci; Stefano Zacchini, Organometallics, 2014

The reaction of [HFe4(CO)12]3– (1) with [Ir(COD)Cl]2 results in the formation of the bimetallic Fe–Ir monohydride carbonyl cluster [HFe4(CO)12(IrCOD)]2– (2). This is quantitatively protonated by strong acids to the dihydride [H2Fe4(CO)12(IrCOD)]− (3). Further addition of acids to 3 results in the ...


Synthesis and Characterization of N-Donor-Functionalized Enantiomerically Pure Pentadienyl Ligands Derived from (1R)-(−)-Myrtenal

22-Dec-2014 | Ann Christin Fecker; Bogdan-Florin Crăciun; Peter Schweyen; Matthias Freytag; Peter G. Jones; Marc D. Walter, Organometallics, 2014

A series of enantiomerically pure −SiMe2NR2 (R = Me, Et) substituted pentadienyl ligands were prepared starting from the natural product (1R)-(−)-myrtenal. Deprotonation with a Schlosser superbase yields the corresponding potassium salts, which were characterized by various spectroscopic ...


Two in One: Luminescence Imaging and 730 nm Continuous Wave Laser Driven Photodynamic Therapy of Iridium Complexes

12-Dec-2014 | Fengfeng Xue; Yang Lu; Zhiguo Zhou; Min Shi; Yuping Yan; Hong Yang; Shiping Yang, Organometallics, 2014

A phosphorescent cationic iridium complex (1) with a donor−π-donor type unit as a N∧N ligand and 2-phenylpyridine as a C∧N ligand was synthesized and characterized. 1 exhibits an intense absorption peak centered at ∼450 nm with a large molar extinction coefficient (ε) of ∼2.4 × 104 M–1 cm–1 and ...


Homoleptic Tris(α,ω-alkanediyl)yttriates of the Type [{Li(dme)}3{Y(CH2-X-CH2)3}] (X = C2H4, C3H6, Si(CH3)2)

12-Dec-2014 | Reinald Fischer; Stefan Bode; Mathias Köhler; Jens Langer; Helmar Görls; Martin D. Hager; Ulrich S. Schubert; Matthi ..., Organometallics, 2014

The metathesis reaction of anhydrous yttrium(III) chloride with ethereal solutions of 1,4-dilithiobutane, 1,5-dilithiopentane as well as bis(lithiomethyl)dimethylsilane in the molar ratio of 1:3 yields the homoleptic yttriates [{Li(dme)}3{Y(C4H8)3}] (2), [{Li(dme)}3{Y(C5H10)3}] (3), and ...


Synthesis and High Solid-State Fluorescence of Cyclic Silole Derivatives

11-Dec-2014 | Yuanjing Cai; Kerim Samedov; Brian S Dolinar; Zhegang Song; Ben Zhong Tang; Chaocan Zhang; Robert West, Organometallics, 2014

Cyclotetrasiloxanes 1–3 containing different silole-based fluorogenic units (silafluorene, 1,3-diphenyl-9-silafluorene, tetraphenylsilole) were synthesized by cohydrolysis and condensation reactions. Their optical properties in solution and as crystals were studied. These compounds have low ...


Remarkably Robust Mono-n-butyl Group IV Dicyclohexylamido Complexes {(Cy)2N}3M(n-butyl) (Cy: cyclohexyl [C6H11], M: Ti, Zr)

08-Dec-2014 | Christian Adler; Gabriele Tomaschun; Marc Schmidtmann; Rüdiger Beckhaus, Organometallics, 2014

The syntheses of alkyl titanium and zirconium dicyclohexylamido complexes from (Cy2N)3MCl (Cy: cyclohexyl, M: Ti 1a, M: Zr 1b) are presented. Particularly the β-H-containing n-butyl derivatives (Cy2N)3MnBu (M: Ti 3a, M: Zr 3b) become available as isolable, thermally stable complexes by reactions ...


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