Search results for "nucleophilic substitution"

showing 2 items of 72 documents

Direct P-functionalization of azobenzene by a cationic phosphidozirconocene complex.

2016

International audience; We report that the cationic phosphidozirconocene complex [(eta(5)-C5H5)(2)Zr(PCy2)][CH3B(C6F5)(3)] (II) reacts with azobenzene, resulting in the expedient formation of Zr complex (2) bound to a tridentate PNN ligand. This reaction proceeds by a mechanism of cooperative nucleophilic substitution of hydrogen. The intermediate sigma(H) adduct (1) has been characterized by NMR spectroscopy.

ortho-acylationHydrogenaromatic azo-compoundschemistry.chemical_element[CHIM.INOR]Chemical Sciences/Inorganic chemistry010402 general chemistryBioinformatics01 natural sciences[ CHIM ] Chemical SciencesAdductalcoholsInorganic Chemistrychemistry.chemical_compoundc-h functionalizationPolymer chemistryNucleophilic substitution[CHIM]Chemical Sciences010405 organic chemistryChemistryLigandCationic polymerizationcinnolinium salts[ CHIM.INOR ] Chemical Sciences/Inorganic chemistryNuclear magnetic resonance spectroscopy0104 chemical sciences3. Good healthAzobenzeneazoxybenzenesalpha-oxocarboxylic acidsazoareneshydrogennucleophilic-substitutionSurface modificationDalton transactions (Cambridge, England : 2003)
researchProduct

On the mechanism of imine elimination from Fischer tungsten carbene complexes

2016

(Aminoferrocenyl)(ferrocenyl)carbene(pentacarbonyl)tungsten(0) (CO)5W=C(NHFc)Fc (W(CO)5(E-2)) is synthesized by nucleophilic substitution of the ethoxy group of (CO)5W=C(OEt)Fc (M(CO)5(1Et)) by ferrocenyl amide Fc-NH– (Fc = ferrocenyl). W(CO)5(E-2) thermally and photochemically eliminates bulky E-1,2-diferrocenylimine (E-3) via a formal 1,2-H shift from the N to the carbene C atom. Kinetic and mechanistic studies to the formation of imine E-3 are performed by NMR, IR and UV–vis spectroscopy and liquid injection field desorption ionization (LIFDI) mass spectrometry as well as by trapping experiments for low-coordinate tungsten complexes with triphenylphosphane. W(CO)5(E-2) decays thermally i…

tungstenIminemechanism010402 general chemistryPhotochemistry01 natural sciencesMedicinal chemistryReductive eliminationFull Research Paperlcsh:QD241-441chemistry.chemical_compoundlcsh:Organic chemistryAmideNucleophilic substitutionlcsh:Science010405 organic chemistryChemistryOrganic ChemistryferroceneOxidative addition0104 chemical sciencesChemistrycarbene complexesAlkoxy groupPseudorotationlcsh:QimineCarbeneBeilstein Journal of Organic Chemistry
researchProduct