Iron(II) and cobalt(II) complexes bearing 8-(1-aryliminoethylidene)quinaldines: Synthesis, characterization and ethylene dimerization behavior

Shengju Song; Tianpengfei Xiao; Carl Redshaw; Xiang Hao; Fosong Wang; Wen-Hua Sun

doi:10.1016/j.jorganchem.2011.03.039

Iron(II) and cobalt(II) complexes bearing 8-(1-aryliminoethylidene)quinaldines: Synthesis, characterization and ethylene dimerization behavior

Shengju Song, Tianpengfei Xiao, Carl Redshaw, Xiang Hao, Fosong Wang, Wen-Hua Sun

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The series of bidentate N^N iron(II) and cobalt(II) complexes containing 8-(1-aryliminoethylidene)quinaldine derived ligands, 8-[2,6-(R¹)₂-4-R²-C₆H₂N=C (Me)]-2-Me-C₁₀H₅N, were synthesized and characterized by elemental and spectroscopic techniques. The molecular structures of Co1 (R¹ = Me, R² = H), Co3 (R¹ = ⁱPr, R² = H) and Co4 (R¹ = R² = Me) were confirmed as the distorted tetrahedral by single crystal X-ray diffraction. On treatment with modified methylaluminoxane (MMAO), these complexes exhibited good catalytic activities of up to 5.71×10⁵ g mol^-1(Fe) h^-1 for the ethylene dimerization at 30°C under 10 atm of ethylene, in which iron pre-catalysts produced butenes with a high selectivity for a-butene. The correlation between metal complexes, catalytic activities and the product formed were investigated under various reaction parameters.

Original language	English
Pages (from-to)	2594-2599
Number of pages	6
Journal	Journal of Organometallic Chemistry
Volume	696
Issue number	13
DOIs	https://doi.org/10.1016/j.jorganchem.2011.03.039
Publication status	Published - 1 Jul 2011

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10.1016/j.jorganchem.2011.03.039

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@article{a5ba5c4252d44b4199420300e23418fd,

title = "Iron(II) and cobalt(II) complexes bearing 8-(1-aryliminoethylidene)quinaldines: Synthesis, characterization and ethylene dimerization behavior",

abstract = "The series of bidentate N^N iron(II) and cobalt(II) complexes containing 8-(1-aryliminoethylidene)quinaldine derived ligands, 8-[2,6-(R1)2-4-R2-C6H2N=C (Me)]-2-Me-C10H5N, were synthesized and characterized by elemental and spectroscopic techniques. The molecular structures of Co1 (R1 = Me, R2 = H), Co3 (R1 = iPr, R2 = H) and Co4 (R1 = R2 = Me) were confirmed as the distorted tetrahedral by single crystal X-ray diffraction. On treatment with modified methylaluminoxane (MMAO), these complexes exhibited good catalytic activities of up to 5.71×105 g mol-1(Fe) h-1 for the ethylene dimerization at 30°C under 10 atm of ethylene, in which iron pre-catalysts produced butenes with a high selectivity for a-butene. The correlation between metal complexes, catalytic activities and the product formed were investigated under various reaction parameters.",

author = "Shengju Song and Tianpengfei Xiao and Carl Redshaw and Xiang Hao and Fosong Wang and Wen-Hua Sun",

year = "2011",

month = jul,

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doi = "10.1016/j.jorganchem.2011.03.039",

language = "English",

volume = "696",

pages = "2594--2599",

journal = "Journal of Organometallic Chemistry",

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TY - JOUR

T1 - Iron(II) and cobalt(II) complexes bearing 8-(1-aryliminoethylidene)quinaldines: Synthesis, characterization and ethylene dimerization behavior

AU - Song, Shengju

AU - Xiao, Tianpengfei

AU - Redshaw, Carl

AU - Hao, Xiang

AU - Wang, Fosong

AU - Sun, Wen-Hua

PY - 2011/7/1

Y1 - 2011/7/1

N2 - The series of bidentate N^N iron(II) and cobalt(II) complexes containing 8-(1-aryliminoethylidene)quinaldine derived ligands, 8-[2,6-(R1)2-4-R2-C6H2N=C (Me)]-2-Me-C10H5N, were synthesized and characterized by elemental and spectroscopic techniques. The molecular structures of Co1 (R1 = Me, R2 = H), Co3 (R1 = iPr, R2 = H) and Co4 (R1 = R2 = Me) were confirmed as the distorted tetrahedral by single crystal X-ray diffraction. On treatment with modified methylaluminoxane (MMAO), these complexes exhibited good catalytic activities of up to 5.71×105 g mol-1(Fe) h-1 for the ethylene dimerization at 30°C under 10 atm of ethylene, in which iron pre-catalysts produced butenes with a high selectivity for a-butene. The correlation between metal complexes, catalytic activities and the product formed were investigated under various reaction parameters.

AB - The series of bidentate N^N iron(II) and cobalt(II) complexes containing 8-(1-aryliminoethylidene)quinaldine derived ligands, 8-[2,6-(R1)2-4-R2-C6H2N=C (Me)]-2-Me-C10H5N, were synthesized and characterized by elemental and spectroscopic techniques. The molecular structures of Co1 (R1 = Me, R2 = H), Co3 (R1 = iPr, R2 = H) and Co4 (R1 = R2 = Me) were confirmed as the distorted tetrahedral by single crystal X-ray diffraction. On treatment with modified methylaluminoxane (MMAO), these complexes exhibited good catalytic activities of up to 5.71×105 g mol-1(Fe) h-1 for the ethylene dimerization at 30°C under 10 atm of ethylene, in which iron pre-catalysts produced butenes with a high selectivity for a-butene. The correlation between metal complexes, catalytic activities and the product formed were investigated under various reaction parameters.

U2 - 10.1016/j.jorganchem.2011.03.039

DO - 10.1016/j.jorganchem.2011.03.039

M3 - Article

VL - 696

SP - 2594

EP - 2599

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 13

ER -