Université de Fribourg

Normal and abnormal carbene complexes derived from thiazole: Preparation and a preliminary investigation of their relative catalytic performance

Stander-Grobler, Elzet ; Schuster, Oliver ; Strasser, Christoph E. ; Albrecht, Martin ; Cronje, Stephanie ; Raubenheimer, Helgard G.

In: Polyhedron, 2011, vol. 30, no. 17, p. 2776-2782

Readily prepared 2-, 4- and 5-bromo-3-methyl thiazolium triflates react by oxidative substitution with M(PPh₃)₄ (M = Ni or Pd) to furnish five of the expected normal and abnormal cationic thiazolylidene complexes (1a, 1b, 2a, 2b, and 3b). Carbene complex formation is accompanied by a ca. 40 ppm downfield shift of the α-N carbene carbons in Pd...

Université de Fribourg

Polyether adducts of d-block metal compounds as starting materials for new cluster compounds

Crochet, Aurélien ; Fromm, Katharina M.

In: Zeitschrift für anorganische und allgemeine Chemie, 2010, vol. 636, no. 8, p. 1484–1496

New crystalline cobalt, nickel, zinc, and mercury halide adducts with polyethers as ligands have been isolated, characterized, and identified as [Co(μ-Cl)₂CoCl₂(glyme)₂] (glyme = 1,2-dimethoxyethane), cis-[CoI₂(H₂O)₂(glyme)₂]²⁺[CoI₄]²⁻, [NiI₂(glyme)₂], [ZnI₂(glyme)], [HgCl₂(glyme)], [CoI₂(diglyme)] (diglyme = bis(2-methoxyethyl)ether), [ZnI₂(diglyme)],...

Université de Neuchâtel

Synthesis, structure and magnetic properties of two end-on double azido bridged nickel(II) dinuclear entities incorporating N,N,N-coordinating tridentate reduced Schiff base ligands

Sarkar, Sumana ; Mondal, Amrita ; El Fallah, Mohamed Salah ; Ribas, Joan ; Chopra, Deepak ; Stoeckli-Evans, Helen ; Krishna Rajak, Kajal

In: Polyhedron, 2006, vol. 25, no. 1, p. 25-30

Complexes of the general formula [Ni2L2 (μ1,1-N3)2(N3)2] have been synthesised in good yields by reacting Ni(NO3)2 • 6H2O with L in the presence of excess of sodium azide in methanol at room temperature. Here L is N,N-bis(2-pyridylmethyl)amine (L1) and...