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RESEARCH PRODUCT
Mononuclear tungsten(VI) complexes with bis(phenolato) ligands: syntheses, characterisations and activity in ROMP reaction
Reijo SillanpääAri Lehtonensubject
Steric effectsCoordination sphereChemistryLigandROMPCrystal structurePhotochemistryMedicinal chemistryInorganic Chemistrychemistry.chemical_compoundMaterials ChemistrySalt metathesis reactionMoleculePhysical and Theoretical ChemistryNorbornenedescription
The reaction of bulky ligand precursor 2,2?-methylenebis(4-methyl-6-tert -butylphenol) (H2mbp) or 2,2?-ethylidenebis(4,6-di-tert butylphenol) (H2ebp) with trisdiolatotungsten(VI) complex [W(eg)3] 1 (eg � /ethanediolate dianion) provides heteroleptic complexes [W(mbp)(eg)2] 2 or [W(ebp)(eg)2] 3, respectively. Sterically less hindered 2,2?-dihydroxy-1,1?-dinaphtylmethane (H2dinap) forms heteroleptic disubstituted complex [W(dinap)2(eg)] 4. The X-ray crystal structure determinations confirmed that the isolated compounds are made of monomeric tris(diolato)tungsten(VI) molecules in which the central tungsten atom is bonded to six oxygen atoms forming a distorted octahedral coordination sphere around the metal ion. Complexes 2 and 3 catalyse the ring opening metathesis reaction of norbornene when activated by Et2AlCl. # 2002 Elsevier Science Ltd. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-01 | Polyhedron |