2 research outputs found
Synthesis and Reactivity of Methylpalladium Complexes Bearing a Partially Saturated IzQO Ligand
No full textA saturated
N-heterocyclic carbene–phenolate bidentate ligand,
3,3a,4,5-tetrahydroimidazo[1,5-<i>a</i>]quinolin-9-olate-1-ylidene
(SIzQO), was synthesized and characterized. The SIzQO ligand was then
treated with PdClMe(pyridine)<sub>2</sub> and [Pd(μ-Cl)Me(2,6-lutidine)]<sub>2</sub>, which afforded <i>C</i>,<i>C</i>-<i>cis</i>-(SIzQO)PdMe(pyridine) and the thermodynamically unstable <i>trans</i> isomer <i>C</i>,<i>C</i>-<i>trans</i>-(SIzQO)PdMe(2,6-lutidine), respectively. The latter
isomerizes at 40 °C into the corresponding <i>cis</i> isomer via a dissociative mechanism. These palladium/SIzQO complexes
catalyze the polymerization of ethylene at 100–120 °C,
although the catalytic activity is lower than that of a previously
reported palladium/imidazo[1,5-<i>a</i>]quinolin-9-olate-1-ylidene
(IzQO) system
Synthesis and Reactivity of Methylpalladium Complexes Bearing a Partially Saturated IzQO Ligand
No full textA saturated
N-heterocyclic carbene–phenolate bidentate ligand,
3,3a,4,5-tetrahydroimidazo[1,5-<i>a</i>]quinolin-9-olate-1-ylidene
(SIzQO), was synthesized and characterized. The SIzQO ligand was then
treated with PdClMe(pyridine)<sub>2</sub> and [Pd(μ-Cl)Me(2,6-lutidine)]<sub>2</sub>, which afforded <i>C</i>,<i>C</i>-<i>cis</i>-(SIzQO)PdMe(pyridine) and the thermodynamically unstable <i>trans</i> isomer <i>C</i>,<i>C</i>-<i>trans</i>-(SIzQO)PdMe(2,6-lutidine), respectively. The latter
isomerizes at 40 °C into the corresponding <i>cis</i> isomer via a dissociative mechanism. These palladium/SIzQO complexes
catalyze the polymerization of ethylene at 100–120 °C,
although the catalytic activity is lower than that of a previously
reported palladium/imidazo[1,5-<i>a</i>]quinolin-9-olate-1-ylidene
(IzQO) system
