Université de Neuchâtel

Di-μ-diphenylphosphido-bis{chlorido[(mesitylmethyl)diphenylphosphine-κP]palladium(II)}

Chahen, Ludovic ; Therrien, Bruno ; Süss-Fink, Georg

In: Acta Crystallographica Section E, 2007, vol. 63, no. 7, p. m1989

In the title dinuclear palladium complex, [Pd2 (C12H10P)2Cl2 (C22H23P)2], the terminal ligands adopt a trans configuration with a Pd•••Pd distance of 3.6111 (4) Å. A crystallographic twofold rotation axis runs perpendicular to the Pd2P2 ring. The Cl atom lies slightly out of the...

Université de Neuchâtel

(±)-Di-μ-chlorido-(μ-N,N'-{[3,3'-methylenebis(2,4,6-trimethyl-3,1-phenylene)]dimethylene}bis(2-methylpropan-2-amine))bis[chloridopalladium(II)]

Chahen, Ludovic ; Therrien, Bruno ; Süss-Fink, Georg

In: Acta Crystallographica Section E, 2007, vol. 63, no. 11, p. m2687

In the title dinuclear palladium complex, [Pd2Cl4 (C29H46N2)], the terminal ligands adopt an anti configuration, with an intramolecular metal-metal distance of 3.3625 (5) Å. The dinuclear palladium complex adopts a V-shaped conformation, with a dihedral angle of 152.67 (3)° between the two chloride-bridged PdNCl3 square-planar...

Université de Neuchâtel

trans-Dichloro{P,P'-[3,3'-oxybis(m-phenylenemethylene)]bis(diphenylphosphine)}palladium(II)

Chahen, Ludovic ; Therrien, Bruno ; Süss-Fink, Georg

In: Acta Crystallographica Section E, 2006, vol. 62, no. 6, p. m1270-m1271

The square-planar title complex, [PdCl2(C38H32OP2)], shows the P atoms to be trans coordinated, with a P-Pd-P angle of 176.50 (4)°. The phenyl rings in the phosphorus ligand are inclined at an angle of 61.2 (1)° to each other.

Université de Neuchâtel

Square-Planar Diacetatopalladium Complexes with trans-Configured Secondary Amine Ligands that Avoid Orthometalation: Ligand Synthesis, Coordination, Molecular Structure and Catalytic Potential for Suzuki Cross-Coupling Reactions

Chahen, Ludovic ; Therrien, Bruno ; Süss-Fink, Georg

In: European Journal of Inorganic Chemistry, 2007, vol. 32, p. 5045-5051

The trans-configured square-planar palladium complexes [Pd(OAc)2 (LNtBu)2] (1), [Pd(OAc)2 (η2-LN∩NtBu)] (2), [Pd(OAc)2 (LNPh)2] (3), and [Pd(OAc)2 (η2-LN∩NPh)] (4), have been synthesized by treating palladium acetate with the amines...

Université de Neuchâtel

Square-planar dichloro palladium complexes with trans-configurated phosphine ligands avoiding ortho-metallation: Ligand design, complex synthesis, molecular structure and catalytic potential for Suzuki cross-coupling reactions

Chahen, Ludovic ; Therrien, Bruno ; Süss-Fink, Georg

In: Journal of Organometallic Chemistry, 2006, vol. 691, no. 20, p. 4257-4264

The square-planar palladium complexes trans-[PdCl2 (PPh2-CH2-2,4,6-C6H2Me3)2] (1) and trans-[PdCl2 (η2-PPh2-CH2-2,4,6-C6HMe3-CH2-2,4,6-C6HMe3-CH2-PPh2)] (2) have been synthesized from...

Université de Neuchâtel

Double HCl elimination and configuration change in the square-planar palladium complex trans-[{(Ph2PC6H4CONH) 2C6H4}PdCl2] under Suzuki conditions: Isolation and molecular structure of cis-[{(Ph2PC6H4CON)2C6H4}Pd]

Chahen, Ludovic ; Karmazin-Brelot, Lydia ; Süss-Fink, Georg

In: Inorganic Chemistry Communications, 2006, vol. 9, no. 12, p. 1151-1154

The trans-configurated square-planar palladium complex trans-[{(Ph2PC6H4CONH) 2C6H4}PdCl2] (1), which catalyzes the Suzuki cross coupling of 4-bromotoluene with phenylboronic acid, was found to react with potassium carbonate in toluene at 90 °C (Suzuki conditions) to give...

Université de Neuchâtel

A new imine ligand avoiding imine–enamine rearrangement and cyclometallation: Synthesis and coordination of Me3C6H2CH2NCHtBu

Chahen, Ludovic ; Therrien, Bruno ; Süss-Fink, Georg

In: Inorganic Chemistry Communications, 2007, vol. 10, no. 11, p. 1375-1377

The new imine ligand (E)-2,4,6- Me3C6H2CH2NCHtBu (1) has been prepared from 2,4,6-trimethylbenzylamine and trimethylacetaldehyde. In this imine, the ortho-positions of the benzyl group are blocked by methyl groups, and there are no β-hydrogen atoms susceptible for imine–enamine rearrangement. Thus, reaction with...

Université de Neuchâtel

New aryl phosphinite ligands avoiding ortho-metallation: Synthesis and molecular structures of trans-[PdCl2(PPh2OR)2] and trans-[Rh(CO)Cl(PPh2OR) 2] (R = 2,4,6-Me3C6H2; 2,6-Ph2C6H3)

Chahen, Ludovic ; Karmazin-Brelot, Lydia ; Süss-Fink, Georg

In: Inorganica Chimica Acta, 2005, vol. 358, no. 12, p. 3417-3422

The new aryl phosphinites PPh2OR (R = 2,4,6-Me3C6H2, 1; R = 2,6-Ph2C6H3, 2) have been prepared from chlorodiphenylphosphine and the corresponding phenols. In these ligands, the ortho-positions of the aromatic phosphite function are blocked by methyl and phenyl substituents, which allows coordination to metal...

Université de Neuchâtel

Complexes plan-carrés de palladium à configuration “trans” : nouveaux ligands, coordination et potentiel catalytique pour le couplage de Suzuki

Chahen, Ludovic ; Süss-Fink, georg (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th. 1953.

La réaction de couplage carbone-carbone de Suzuki représente une des meilleures voies de synthèse des composés biaryles. Ces composés constituent des blocs de construction fondamentaux en synthèse organique, et leur préparation représente un défi important pour les industriels. Le mécanisme de la réaction de Suzuki a fait l’objet de nombreuses recherches et il reste encore...