C18:1 Methyl Ester Metathesis in [bmim][X] Type Ionic Liquids

The efficacy of [bmim][X] ionic liquids (ILs) (X = PF6−, BF4− and NTf2−) as reaction media for methyl oleate metathesis was compared with that of conventional organic solvents (PhCl, PhMe, DCM and DCE) using the well-defined first and second generation Grubbs precatalysts, RuCl2(PCy3)(L)(=CHPh) (L = PCy3 or H2IMes). Best catalytic performance, with excellent selectivity (>98%) at moderate reaction temperatures, was achieved in [bmim][X] ILs compared to conventional solvents. The effects of anion, reaction temperature, solvent polarity, solvent viscosity, and ligand-anion interaction on the reaction are also addressed

Ruthenium Carbene Mediated Metathesis of Oleate-Type Fatty Compounds

The complexes RuCl2(PCy3)2(=CHPh), 1, and RuCl2(PCy3)(H2IMes)(=CHPh), 2, proved to be active catalysts for the self-metathesis of oleate-type fatty compounds containing the ester, hydroxyl, epoxy and carboxylic acid functional groups. At elevated reaction temperatures 2 showed a higher activity, stability and lower selectivity for primary metathesis products compared to 1. A profound influence of organic functional groups on catalyst activity and selectivity was found and from relative activities and selectivities 2 has proved to be more resistant to deactivation by polar functional groups and more inclined to promote double bond isomerisation than 1. The observed catalyst deactivation by oxygen-containing functional groups could be attributed to a phosphine displacement side reaction

Metathesis of Fatty Acid Ester Derivatives in 1,1-Dialkyl and 1,2,3-Trialkyl Imidazolium Type Ionic Liquids

The self-metathesis of methyl oleate and methyl ricinoleate was carried out in the presence of ruthenium alkylidene catalysts 1–4 in [bmim] and [bdmim][X] type ionic liquids (RTILs) (X = PF6−, BF4− and NTf2−) using the gas chromatographic technique. Best catalytic performance was obtained in [bdmim][X] type ionic liquids when compared with [bmim][X] type ionic liquids. Catalyst recycling studies were also carried out in the room temperature ionic liquids (RTILs) with catalysts 1–4 in order to explore their possible industrial application

Synthesis and Structure of a Binuclear Cu(II) Complex of 1,3- bis [N,N-bis(2-picolyl)amino]propan-2-ol

The synthesis and crystal structure of Cu(II) complex of a binucleating tridentateligand 1,3-bis [N,N-bis(2-picolyl)amino]propan-2-ol (I) is being reported. The two chelatingbispicolylamine arms in I are tethered by a 2-hydroxypropyl group with Cu(II) coordinatingin a slightly distorted square planar geometry to give [Cu2(I)(OH2)(Cl)](ClO4)3·2H2O (II).The crystal data for II: Triclinic, space group Pī with cell dimensions of a = 13.345 (4) å,b = 13.873 (4) å, c = 12.867 (2) å, α = 111.68 (2)°, β = 100.34 (2)°, γ = 65.83 (2)°, V =2018.4 (9) å3, F.W. = 962.46, ρcalc = 1.583 g cm-3 for Z = 2, μ = 13.93 cm-