Reduction of Nitrous Oxide by Light Alcohols Catalysed by a Low-Valent Ruthenium Diazadiene Complex.

Decomposition of the environmentally harmful gas nitrous oxide (N O) is usually performed thermally or catalytically. Selective catalytic reduction (SCR) is currently the most promising technology for N O mitigation, a multicomponent heterogeneous catalytic system that employs reducing agents such as ammonia, hydrogen, hydrocarbons, or a combination thereof. This study reports the first homogenous catalyst that performs the reduction of nitrous oxide employing readily available and cheap light alcohols such as methanol, ethanol or ethylene glycol derivatives.

A Germapyramidane Switches Between 3D Cluster and 2D Cyclic Structures in Single-Electron Steps.

Reaction of the imidazolium-substituted iphosphate-diide, (Ipr) C P (IDP), with GeCl  ⋅ dioxane and KBArF [(BarF ) =tetrakis[(3,5-trifluoromethyl)phenyl]borate)] afforded the dicationic spherical-aromatic nido-cluster [Ge(η -IDP)] ([1] ) (Ipr=1,3-bis(2,6-diisopropylphenyl)imidazolium-2-ylidene). This complex is a rare heavy analogue of the elusive pyramidane [C(η -C H )]. [1] undergoes two reversible one-electron reductions, which yield the radical cation [2]⋅ and the neutral Ge species 3.

Bis(imidazolium)-1,3-diphosphete-diide: A Building Block for FeC P Complexes and Clusters.

Reaction of the 6π-electron aromatic four-membered heterocycle (IPr) C P (1) (IPr=1,3-bis(2,6-diisopropylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene) with [Fe CO ] gives the neutral iron tricarbonyl complex [Fe(CO) -η -{(IPr) C P }] (2). Oxidation with two equivalents of the ferrocenium salt, [Fe(Cp) ](BArF ), affords the dicationic tricarbonyl complex [Fe(CO) -η -{(IPr) C P }](BArF ) (4). The one-electron oxidation proceeds under concomitant loss of one CO ligand to give the paramagnetic dicarbonyl radical cation complex [Fe(CO) -η -{(IPr) C P }](BArF ) (5).

Remarkable stability of a molecular ruthenium complex in PEM water electrolysis.

The dinuclear Ru diazadiene olefin complex, [Ru(OTf)(μ-H)(Medad)(dbcot)], is an active catalyst for hydrogen evolution in a Polymer Exchange Membrane (PEM) water electrolyser. When supported on high surface area carbon black and at 80 °C, [Ru(OTf)(μ-H)(Medad)(dbcot)]@C evolves hydrogen at the cathode of a PEM electrolysis cell (400 mA cm, 1.9 V).

Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records.

Millennial-scale palaeoclimate variability has been documented in various terrestrial and marine palaeoclimate proxy records throughout the Northern Hemisphere for the last glacial cycle. Its clear expression and rapid shifts between different states of climate (Greenland Interstadials and Stadials) represents a correlation tool beyond the resolution of e.g.