New bis(azolylcarbonyl)pyridine chromium(III) complexes as initiators for ethylene polymerization

John Hurtado, Javiera Ugarte, René Rojas, Mauricio Valderrama, Desmond Mac-Leod Carey, Alvaro Muñoz-Castro, Ramiro Arratia-Pérez, Roland Fröhlich

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

12 Citas (Scopus)

Resumen

Reaction of 2,6-pyridinedicarbonyl dichloride with 3,5-dimethylpyrazole and 1H-indazole, respectively, yield the tridentate ligands 2,6-bis(3,5- dimethylpyrazol-1-ylcarbonyl)pyridine (1) and 2,6-bis(indazol-1-ylcarbonyl) pyridine (2). The molecular structure of the new compound (2) was determined by single-crystal X-ray diffraction. These ligands react with CrCl 3(THF)3 in THF to form neutral complexes of general formula [CrCl3{2,6-bis(azolylcarbonyl)pyridine-N,N,N}] (3, 4) which were isolated in high yield as air stable green solids and characterized by elemental analysis, magnetic moment, IR, and mass spectroscopies. Theoretical calculations predict that the thermodynamically preferred structure of the complexes is the fac configuration. After reaction with methylaluminoxane (MAO) the chromium(III) complexes are active for the polymerization of ethylene.

Idioma originalInglés
Páginas (desde-hasta)218-223
Número de páginas6
PublicaciónInorganica Chimica Acta
Volumen378
N.º1
DOI
EstadoPublicada - 30 nov. 2011

Áreas temáticas de ASJC Scopus

  • Química física y teórica
  • Química inorgánica
  • Química de los materiales

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