A bimetallic complex, in which a RuCl2 (eta(2)C(2)H(4))(PCy3) fragment is connected via three chloro, bridges to a (eta(6)-p-cymene)RuCl2 fragment, has been synthesized and characterized by single-crystal X-ray crystallography. This complex was used to cat ...

2005

Syntheses and structures of homo- and heterobimetallic complexes containing a (cyclopentadienone)rhodium(I) fragment

Kay Severin, Rosario Scopelliti, Sébastien Gauthier

The reaction of RhCl(eta(4)-Ph2R2C4CO) (R = Ph, 2-naphthyl) with the dimeric complexes RuCl2(p-cymene) p-cymene = 1-methyl-4-(1-methylethyl)benzene, RuCl2(1,3,5-Et3C6H3), MCl2(Cp*) (M = Rh, Ir; Cp* = 1,2,3,4,5-pentamethylcyclopenta-2,4- ...

2005

Heterobimetallic complexes as catalyst precursors for the Oppenauer-type oxidation of alcohols

Kay Severin, Sébastien Gauthier

A heterobimetallic Ru(II)-Rh(I) complex has been identified as a potent catalyst precursor for the Oppenauer-type oxidation of alcohols. With 0.1-0.5 mol% of this complex and K2CO3 as the co-catalyst, it is possible to oxidize secondary and primary alcohol ...

2005

Highly cross-linked polymers containing N,N ',N ''-chelate ligands for the Cu(II)-mediated hydrolysis of phosphoesters

Kay Severin, Rosario Scopelliti, Alexander Schiller

Three immobilized Cu(II) complexes were generated by the following: (a) homopolymerization of the N,N',N '' chelate ligand tris[2-(1-vinylimidazolyl)]phosphine (1) and subsequent metalation with CuCl2; (b) copolymerization of 1 with ethyleneglycol dimethac ...

2005

Neutral metallomacrocycles with four or ten (PEt3)Pd(II) centers

Kay Severin, Rosario Scopelliti, Thomas Brasey

The reaction of (Et3P)PdCl2 with 2,3-dihydroxypyridine, 5-chloro-2,3,-dihydroxypyridine, or 2-hydroxynicotinic acid in the presence of base gives neutral, metallomacrocyclic compounds in which the heterocycles act as dianionic, bridging ligands. The m ...

2005

Syntheses and Structures of the Trinuclear Ruthenium Complexes [RuCl2(PAd2Bu)]3 and [RuCl2(PtBu2Cy)]3

Kay Severin, Rosario Scopelliti, Sébastien Gauthier

The trinuclear Ru complexes [RuCl2(PAd2Bu)]3 (1) and [RuCl2(PtBu2Cy)]3 (2) were obtained by reaction of [(p-cymene)RuCl2]2 with 2 equiv of the resp. sterically demanding phosphine. Crystallog. analyses of 1 and 2 show that the three metal fragments are con ...

2005

Atom transfer radical additions with the cationic half-sandwich complex [Cp*Ru(PPh3)(2)(CH3CN)]OTf

Laurent Quebatte, Kay Severin, Rosario Scopelliti

The cationic ruthenium half-sandwich complex [CpRu(PPh3)(2)(CH3CN)][OTf] (2) (CP = eta(5)-C5Me5, OTf = SO3CF3) was synthesized by reduction of Cp*RuCl2 with zinc in the presence of NaOTf and subsequent reaction with PPh3. When NaOTf was omitted, the ...

2005

Site-isolated porphyrin catalysts in imprinted polymers

Estelle Burri, Corinne Daguenet, Kay Severin

A meso-tetraaryl ruthenium porphyrin complex having four polymerizable vinylbenzoxy groups (2) has been synthesized by reaction of pyrrole with 4-(vinylbenzoxy)benzaldehyde and subsequent metalation with [Ru-3(CO)(12)]. The porphyrin complex was immobilize ...

2005

A chemosensor array for the colorimetric identification of 20 natural amino acids

Kay Severin, Andrey Buryak

2005

Selection experiments with dynamic combinatorial libraries: the importance of the target concentration

Kay Severin

Experimental data are presented which demonstrate that the target concentration has a strong influence on the outcome of selection experiments with a dynamic mixture of self-assembled receptors. ...

Royal Society of Chemistry2005

Dynamic Combinatorial Libraries of Dye-Complexes as Sensors

Kay Severin, Andrey Buryak

A simple soln.: Simply dissolving three com. available dyes and two metal salts in a buffer is sufficient to create a sensor which allows the identification of dipeptides with high selectivity by using UV/Vis spectroscopy (see picture for the adaptive beha ...

Wiley-VCH Verlag GmbH2005

A new method for the synthesis of boronate macrocycles

Kay Severin, Rosario Scopelliti, Nicolas Christinat

The condensation of aryl boronic acids with 2,3-dihydroxypyridine gives boronates, which self-assemble to form tetrameric macrocycles as evidenced by X-ray crystallographic analyses. ...

Royal Society of Chemistry2004

Stabilization of molecular LiF, LiFHF, and Na2SiF6 using metallamacrocyclic hosts

Kay Severin, Marie-Line Lehaire

The molecular forms of LiF, LiFHF and Na2SiF6 have been stabilized using trinuclear metallamacrocyclic complexes of (cymene)Ru-II, (Cp*)Rh-III and (Cp*)Ir-III as specific receptors. The host-guest complexes were characterized by NMR spectroscopy and single ...

2003

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