TY - JOUR
T1 - Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands
T2 - Synthesis, structures and ethylene polymerization behavior
AU - Hurtado, John
AU - Carey, Desmond Mac Leod
AU - Muñoz-Castro, Alvaro
AU - Arratia-Pérez, Ramiro
AU - Quijada, Raúl
AU - Wu, Guang
AU - Rojas, René
AU - Valderrama, Mauricio
N1 - Funding Information:
Financial support by FONDECYT (Projects 1060597 and 1070345), FONDAP (Project 11980002), UNAB (Projects DI-09-09/I and DI-09-09/R), CONICYT (Apoyo de Tesis Doctoral 23070215) is gratefully acknowledged. J.H. acknowledges VRAI, Pontificia Universidad Católica de Chile, for a doctoral fellowship.
PY - 2009/7/15
Y1 - 2009/7/15
N2 - Reactions of 2,6-bis(bromomethyl)pyridine with 3,5-dimethylpyrazole and 1H-indazole yield the terdentate ligands 2,6-bis(3,5-dimethylpyrazol-1-ylmethyl)pyridine (5) and 2,6-bis(indazol-2-ylmethyl)pyridine (6). The molecular structure of the new compound 6 was determined by single-crystal X-ray diffraction. These ligands react with the CrCl3(THF)3 complex in THF to form neutral complexes of general formula [CrCl3{2,6-bis(azolylmethyl)pyridine-N,N,N}] (7, 8) which are isolated in high yields as stable green solids and characterized by means of elemental analysis, magnetic moments, IR, and mass spectroscopy. 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 in the polymerization of ethylene.
AB - Reactions of 2,6-bis(bromomethyl)pyridine with 3,5-dimethylpyrazole and 1H-indazole yield the terdentate ligands 2,6-bis(3,5-dimethylpyrazol-1-ylmethyl)pyridine (5) and 2,6-bis(indazol-2-ylmethyl)pyridine (6). The molecular structure of the new compound 6 was determined by single-crystal X-ray diffraction. These ligands react with the CrCl3(THF)3 complex in THF to form neutral complexes of general formula [CrCl3{2,6-bis(azolylmethyl)pyridine-N,N,N}] (7, 8) which are isolated in high yields as stable green solids and characterized by means of elemental analysis, magnetic moments, IR, and mass spectroscopy. 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 in the polymerization of ethylene.
KW - Chromium
KW - Ethylene polymerization
KW - Terdentate ligands
KW - Theoretical studies
UR - http://www.scopus.com/inward/record.url?scp=66549088068&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2009.04.014
DO - 10.1016/j.jorganchem.2009.04.014
M3 - Short survey
AN - SCOPUS:66549088068
SN - 0022-328X
VL - 694
SP - 2636
EP - 2641
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 16
ER -