N‐Heterocyclic carbene (NHC) ruthenium complexes consisting of different donor substituents attached to the NHC ligand efficiently catalyse the transfer hydrogenation of ketones and of activated olefins in α,β‐unsaturated ketones to give saturated alcohols. The most active catalyst precursor contains a tethered olefin as a hemilabile donor site. This complex also converts nitriles and, depending on the reaction conditions, either benzylamines are produced by means of transfer hydrogenation, or amides from formal addition of H2O. Kinetic analysis of the double hydrogenation of α,β‐unsaturated ketones indicates fast isomerisation of the enol intermediate to its saturated ketone tautomer prior to the second hydrogenation.

No abstract

The intermolecular Pauson-Khand reaction is often limited by the poor reactivity and selectivity of simple alkenes. Here we expanded the range of reagents to simple alkenyl-and alkynyl-substituted porphyrins. The two expected regioisomers could be obtained in a combined yield of up to 72 %. In

Ground-and excited-state electronic structure of an emissive pyrazine-bridged Ruthenium(II) dinuclear complex Browne, Wesley R.; O'Boyle, Noel M.; Henry, William; Guckian, Adrian L.; Horn, Sabine; Fett, Thomas; O'Connor, Christine M.; Duati, Marco; Cola, Luisa De; Coates, Colin G. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum.

Synthesis of asymmetric supramolecular compounds using a Ni(0) catalysed homo-coupling approach Cassidy, Lynda; Horn, Sabine; Cleary, Laura; Halpin, Yvonne; Browne, Wesley; Vos, Johannes G. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. The synthesis and characterisation of a series of dinuclear ruthenium and osmium polypyridyl metal complexes based on the bridging ligands [5-(5¢-bipyridin-2¢,2¢¢-yl)-3-(pyridin-2-yl)]-1,2,4-triazole (Hpytr-bipy), 2,2¢-bis(pyridin-2¢¢yl)-5,5¢-bis(pyridin-3¢¢-yl) (bipy-bipy) and 5,5¢-bis(pyridin-2¢¢-yl)-3,3¢-bis(1,2,4-triazole) (Hpytr-Hpytr) are reported. The dinuclear complexes have been synthesised via a Ni(0) catalysed cross-coupling reaction from brominated precursors. With this approach a mixture of three products is obtained, which are separated by chromatographic methods. The compounds obtained are characterised by elemental analysis, 1 H NMR, absorption and emission spectroscopy. The synthetic approach developed offers a new route to asymmetric multinuclear supramolecular structures that is complimentary to the complexes as ligands/complexes as metal approaches.