Search results for "IMINE LIGANDS"

showing 3 items of 3 documents

Assembly and encapsulation of coordination tectons driven by hydrogen-bondingand space-filling

2001

[FR] Le composé ¿Fe(LI)3¿2¿Fe(H2O)6¿(ClO4)6 (2), LI = 1,10-phénanthroline-5,6-dione, a été synthétisé et caractérisé. La structure cristalline 2 est définie par un assemblage bidimensionnel non covalent, peu commun, constitué par des tectons chiraux ¿Fe(LI)3¿2+, assemblés par des cations ¿Fe(H2O)6¿2+ encapsulés dans des cages. Ces cages sont formées par 12 liaisons hydrogène établies entre les molécules d¿eau coordinées et les groupes dione appartenant à six molecules chirales ¿Fe(LI)3¿2+ ¿, ¿ alternées.

HydrogenIron(II) low-spin tectonsStereochemistrychemistry.chemical_elementSupramolecular interactionCrystal structureHydrogen bondsPerchloratechemistry.chemical_compoundChemical preparationMoleculeNon-Covalent assemblyInteraction supramoléculaireLigands alpha-diimineDiketoneChemistryHydrogen bondGeneral ChemistryOrthodiquinone ligandsLigands orthodiquinoneAssemblage non covalentCrystallographyFISICA APLICADALiaisons hydrogèneAlpha-Diimine ligandsFer(II) bas spin
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Phenoxyamidine Zn and Al Complexes: Synthesis, Characterization, and Use in the Ring-Opening Polymerization of Lactide

2019

International audience; Herein we report the synthesis of new ditopic ligands, which consist of a phenoxy group and N,N,N'trisubstituted amidines linked by a methylene spacer (L1-L4). Their coordination chemistry has been studied/investigated with Zn(II) and Al(III). Alkane elimination route between the phenol-amidine proligands (L1H-L4H) and Et2Zn led to dinuclear complexes [(L1-L4)ZnEt]2 (1a-4a) in which the Zn centers are chelated by phenoxyamidine ligands and bridged through the oxygen atom of the phenoxy groups. Salt metathesis reaction between two equivalents of the sodium amidine phenate L1Na and ZnCl2 led to a bis-chelate chiral spiro-complex (L12Zn) 1a'. Analogous alkane eliminatio…

STRUCTURAL-CHARACTERIZATIONchemistry.chemical_elementCATALYSTSZinc010402 general chemistryLIGANDS SYNTHESIS01 natural sciencesRing-opening polymerizationCoordination complexCatalysisInorganic Chemistrychemistry.chemical_compoundZINCIMINE LIGANDSGroup (periodic table)Polymer chemistry[CHIM.COOR]Chemical Sciences/Coordination chemistryPhysical and Theoretical ChemistryMethyleneCYCLIC ESTERSALUMINUM COMPLEXESchemistry.chemical_classificationEPSILON-CAPROLACTONELactide010405 organic chemistryOrganic ChemistryGROUP-4 METAL-COMPLEXES[CHIM.CATA]Chemical Sciences/CatalysisImine ligands0104 chemical scienceschemistryINITIATORSGROUP-4 METAL-COMPLEXES; ALUMINUM COMPLEXES; EPSILON-CAPROLACTONE; LIGANDS SYNTHESIS; IMINE LIGANDS; STRUCTURAL-CHARACTERIZATION; CYCLIC ESTERS; ZINC; CATALYSTS; INITIATORS
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Efficient ethylene polymerisation catalysis by a cationic benzyl hafnium complex containing pyrrolide-imine ligandsElectronic supplementary informati…

2002

A dibenzyl hafnium(IV) complex containing pyrrolide-imine chelate ligands was synthesized and investigated as an ethylene polymerisation catalyst.

inorganic chemicalschemistryEthylene polymerizationPolymer chemistryCationic polymerizationchemistry.chemical_elementOrganic chemistryChelationGeneral ChemistryImine ligandsHafniumCatalysisJournal of the Chemical Society, Dalton Transactions
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