The structure of the title compound, [Cu4(CH3O)4(C11H13O2)4], consists of dimeric dinuclear copper(II) complexes oriented around a centre of inversion. Within each dinuclear fragment, the two Cu(II) atoms are in a distorted square-planar coordination sphere. Two neighbouring fragments are linked by four apical Cu-O contacts, yielding an overall square-pyramidal coordination environment for each...

Structurally distinctive dinuclear Ni(II) complexes with furan or thiophene tethered amine-pyrazolyl tripodal hybrid ligands have been synthesized and crystallographically characterized. All complexes are catalytically active towards cross-coupling of aryl/alkyl Grignard reagents with β-H containing alkyl halides at room temperature in the presence of N,N,N',N'-tetramethylethylenediamine (TMEDA...

We report the synthesis and comprehensive characterization of a series (oligo)thiophene-bridged (bis)phenanthroline ligands. The complexation behavior ditopic ligands with Cu(I) was explored by high-resolution ESI mass spectrometry, UV-vis spectroscopy, electrochemistry. Whereas ligands, in which phenanthrolines are bridged smaller (oligo)thiophene units, provided mainly mononuclear complexes, ...

The coordinating properties of the bis(1,4-dimethyl-1,2,4-triazol-5-ylidene) ligand (abbreviated as bitz) towards silver(I) and gold(I) centres have been explored. bitz behaves bridging giving both dinuclear [M2(bitz)2](PF6)2 trinuclear [M3(bitz)3](PF6)3 species, whose formation has supported by X-ray diffraction analysis, NMR spectroscopy mass spectrometry evidences. complexes present very sim...

Unprotected mononuclear pyrene-modified (bispyridylaminomethyl)methylphenol copper complexes were designed to be immobilized at multiwalled carbon nanotube (MWCNT) electrodes and form dinuclear bis(mu-phenolato) on the surface. These exhibit a high oxygen reduction reaction activity of 12.7 mA cm(-2) an onset potential 0.78 V versus reversible hydrogen electrode. The higher these compared that ...

The neutral chloro complexes [(g-C5Me5)M(g-NC9H6O)Cl] as well as the cationic aqua complexes [(g-C5Me5)M(g-NC9H6O)(H2O)] (M = Rh, Ir) have been synthesized from the reaction of the dinuclear precursors [(g-C5Me5)MCl2]2 and 8-hydroxyquinoline. The single crystal X-ray structure analysis of [(g-C5Me5)Ir(g-NC9H6O)Cl] reveals for these complexes a piano-stool arrangement with the aromatic ligand, t...

The interactions of four antitumor azolato-bridged dinuclear platinum(II) complexes, [{cis-Pt(NH(3))(2)}(2)(μ-OH)(μ-azolato)](2+), with calf thymus DNA were monitored dose- and time-dependently, by using circular dichroism. Complexes 1-4 reacted with DNA via a two-step interaction that comprised a prompt diffusion-controlled reaction, which induced a B- to C-form transition, and a relatively sl...

Some of the most active catalysts for carbon dioxide and epoxide copolymerization are dinuclear metal complexes. Whilst efficient homodinuclear catalysts are known, until now heterodinuclear catalysts remain unreported. Here, a facile, in situ route to a catalyst system comprising amixture of homoand heteronuclear Zn–Mg complexes is presented. This catalyst system shows excellent polymerization...

Abstraction of chloride anion from Au(I) complexes such as JohnPhosAuCl in noncoordinating solvents with 1 equiv of a silver salt, or even larger amounts, leads to the formation of chloride-bridged dinuclear gold(I) complexes, irrespective of the counteranion, which are substantially less reactive as catalysts. This incomplete removal of chloride ligand could lead to false negative results when...

Some of the most active catalysts for carbon dioxide and epoxide copolymerization are dinuclear metal complexes. Whilst efficient homodinuclear catalysts are known, until now heterodinuclear catalysts remain unreported. Here, a facile, in situ route to a catalyst system comprising a mixture of homo- and heteronuclear Zn-Mg complexes is presented. This catalyst system shows excellent polymerizat...