Synthesis, characterization, and hydrolysis of aluminum(III) compounds bearing the C6F5-substituted β-diketiminate HC[(CMe)(NC6F5)]2 (L) ligand

Zhi Yang; Hongping Zhu; Xiaoli Ma; Jianfang Chai; Herbert W. Roesky; Cheng He; Jörg Magull; Hans Georg Schmidt; Mathias Noltemeyer

doi:10.1021/ic051718o

Synthesis, characterization, and hydrolysis of aluminum(III) compounds bearing the C₆F₅-substituted β-diketiminate HC[(CMe)(NC₆F₅)]₂ (L) ligand

Zhi Yang, Hongping Zhu, Xiaoli Ma, Jianfang Chai, Herbert W. Roesky^*, Cheng He, Jörg Magull, Hans Georg Schmidt, Mathias Noltemeyer

^*Corresponding author for this work

University of Göttingen

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

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Abstract

A series of Al(III) compounds containing the C₆F ₅-substituted β-diketiminate ligands LAlMeCl (2), LAlMe ₂ (3), LAlMel (4), and LAlBr₂ (5) (L = HC[(CMe)(NC ₆F₅)]₂) were synthesized and characterized. The hydrolysis of 2 and 4 in the presence of 1,3-diisopropyl-4,5-dimethylimidazol- 2-ylidene as the hydrogen halide acceptor both lead to (LAlMe) ₂-(μ-O) (6), a methylalumoxane derivative, which is the first hydrolysis product with the general formula of (RAlMe)_nO. A comparison of the hydrolysis products of 2 and 4 with that of L′AlMeCl (L′ = HC[(CMe)(NAr)]₂, Ar = 2,6-iPr₂C ₆H₃) shows that with the C₆F ₅-substituted β-diketiminate ligand, it was not possible to generate LAlMe(OH). This is obviously due to the stronger Brönsted acidity of the proton and the smaller size of the C₆F₅ group in this compound compared to that of the corresponding 2,6-iPr₂C ₆H₃ derivative.

Original language	English
Pages (from-to)	1823-1827
Number of pages	5
Journal	Inorganic Chemistry
Volume	45
Issue number	4
DOIs	https://doi.org/10.1021/ic051718o
Publication status	Published - 20 Feb 2006
Externally published	Yes

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@article{24969af73fb54560b2d431f82712f304,

title = "Synthesis, characterization, and hydrolysis of aluminum(III) compounds bearing the C6F5-substituted β-diketiminate HC[(CMe)(NC6F5)]2 (L) ligand",

abstract = "A series of Al(III) compounds containing the C6F 5-substituted β-diketiminate ligands LAlMeCl (2), LAlMe 2 (3), LAlMel (4), and LAlBr2 (5) (L = HC[(CMe)(NC 6F5)]2) were synthesized and characterized. The hydrolysis of 2 and 4 in the presence of 1,3-diisopropyl-4,5-dimethylimidazol- 2-ylidene as the hydrogen halide acceptor both lead to (LAlMe) 2-(μ-O) (6), a methylalumoxane derivative, which is the first hydrolysis product with the general formula of (RAlMe)nO. A comparison of the hydrolysis products of 2 and 4 with that of L′AlMeCl (L′ = HC[(CMe)(NAr)]2, Ar = 2,6-iPr2C 6H3) shows that with the C6F 5-substituted β-diketiminate ligand, it was not possible to generate LAlMe(OH). This is obviously due to the stronger Br{\"o}nsted acidity of the proton and the smaller size of the C6F5 group in this compound compared to that of the corresponding 2,6-iPr2C 6H3 derivative.",

author = "Zhi Yang and Hongping Zhu and Xiaoli Ma and Jianfang Chai and Roesky, {Herbert W.} and Cheng He and J{\"o}rg Magull and Schmidt, {Hans Georg} and Mathias Noltemeyer",

year = "2006",

month = feb,

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doi = "10.1021/ic051718o",

language = "English",

volume = "45",

pages = "1823--1827",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Synthesis, characterization, and hydrolysis of aluminum(III) compounds bearing the C6F5-substituted β-diketiminate HC[(CMe)(NC6F5)]2 (L) ligand

AU - Yang, Zhi

AU - Zhu, Hongping

AU - Ma, Xiaoli

AU - Chai, Jianfang

AU - Roesky, Herbert W.

AU - He, Cheng

AU - Magull, Jörg

AU - Schmidt, Hans Georg

AU - Noltemeyer, Mathias

PY - 2006/2/20

Y1 - 2006/2/20

N2 - A series of Al(III) compounds containing the C6F 5-substituted β-diketiminate ligands LAlMeCl (2), LAlMe 2 (3), LAlMel (4), and LAlBr2 (5) (L = HC[(CMe)(NC 6F5)]2) were synthesized and characterized. The hydrolysis of 2 and 4 in the presence of 1,3-diisopropyl-4,5-dimethylimidazol- 2-ylidene as the hydrogen halide acceptor both lead to (LAlMe) 2-(μ-O) (6), a methylalumoxane derivative, which is the first hydrolysis product with the general formula of (RAlMe)nO. A comparison of the hydrolysis products of 2 and 4 with that of L′AlMeCl (L′ = HC[(CMe)(NAr)]2, Ar = 2,6-iPr2C 6H3) shows that with the C6F 5-substituted β-diketiminate ligand, it was not possible to generate LAlMe(OH). This is obviously due to the stronger Brönsted acidity of the proton and the smaller size of the C6F5 group in this compound compared to that of the corresponding 2,6-iPr2C 6H3 derivative.

AB - A series of Al(III) compounds containing the C6F 5-substituted β-diketiminate ligands LAlMeCl (2), LAlMe 2 (3), LAlMel (4), and LAlBr2 (5) (L = HC[(CMe)(NC 6F5)]2) were synthesized and characterized. The hydrolysis of 2 and 4 in the presence of 1,3-diisopropyl-4,5-dimethylimidazol- 2-ylidene as the hydrogen halide acceptor both lead to (LAlMe) 2-(μ-O) (6), a methylalumoxane derivative, which is the first hydrolysis product with the general formula of (RAlMe)nO. A comparison of the hydrolysis products of 2 and 4 with that of L′AlMeCl (L′ = HC[(CMe)(NAr)]2, Ar = 2,6-iPr2C 6H3) shows that with the C6F 5-substituted β-diketiminate ligand, it was not possible to generate LAlMe(OH). This is obviously due to the stronger Brönsted acidity of the proton and the smaller size of the C6F5 group in this compound compared to that of the corresponding 2,6-iPr2C 6H3 derivative.

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DO - 10.1021/ic051718o

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ER -

Synthesis, characterization, and hydrolysis of aluminum(III) compounds bearing the C₆F₅-substituted β-diketiminate HC[(CMe)(NC₆F₅)]₂ (L) ligand

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