Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior

John Hurtado; Desmond Mac Leod Carey; Alvaro Muñoz-Castro; Ramiro Arratia-Pérez; Raúl Quijada; Guang Wu; René Rojas; Mauricio Valderrama

doi:10.1016/j.jorganchem.2009.04.014

Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior

John Hurtado, Desmond Mac Leod Carey, Alvaro Muñoz-Castro, Ramiro Arratia-Pérez, Raúl Quijada, Guang Wu, René Rojas, Mauricio Valderrama^*

^*Corresponding author for this work

Research output: Contribution to journal › Short survey › peer-review

19 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	2636-2641
Number of pages	6
Journal	Journal of Organometallic Chemistry
Volume	694
Issue number	16
DOIs	https://doi.org/10.1016/j.jorganchem.2009.04.014
State	Published - 2009
Externally published	Yes

Bibliographical note

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.

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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Hurtado, J., Carey, D. M. L., Muñoz-Castro, A., Arratia-Pérez, R., Quijada, R., Wu, G., Rojas, R., & Valderrama, M. (2009). Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior. Journal of Organometallic Chemistry, 694(16), 2636-2641. https://doi.org/10.1016/j.jorganchem.2009.04.014

@article{a4d29cf71a1b4f9db118e51bac05e853,

title = "Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior",

abstract = "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.",

keywords = "Chromium, Ethylene polymerization, Terdentate ligands, Theoretical studies",

author = "John Hurtado and Carey, {Desmond Mac Leod} and Alvaro Mu{\~n}oz-Castro and Ramiro Arratia-P{\'e}rez and Ra{\'u}l Quijada and Guang Wu and Ren{\'e} Rojas and Mauricio Valderrama",

note = "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 Cat{\'o}lica de Chile, for a doctoral fellowship. ",

year = "2009",

month = jul,

day = "15",

doi = "10.1016/j.jorganchem.2009.04.014",

language = "English",

volume = "694",

pages = "2636--2641",

journal = "Journal of Organometallic Chemistry",

issn = "0022-328X",

publisher = "Elsevier B.V.",

number = "16",

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Hurtado, J, Carey, DML, Muñoz-Castro, A, Arratia-Pérez, R, Quijada, R, Wu, G, Rojas, R & Valderrama, M 2009, 'Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior', Journal of Organometallic Chemistry, vol. 694, no. 16, pp. 2636-2641. https://doi.org/10.1016/j.jorganchem.2009.04.014

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 -

Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior

Abstract

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ASJC Scopus subject areas

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