What question did this study set out to answer?

To synthesize and characterize mono- and dialkyl β-diketiminato aluminum complexes and examine their reactivity toward methyl abstraction reagents.

June 16, 1998Organometallics

Synthesis, Structure, and Reactivity of β-Diketiminato Aluminum Complexes

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Authors

BQBaixin QianNanosys (United States)DWDonald L. WardUnited States Department of the Army MSMilton R. SmithMichigan State University

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Implication

Experimental study demonstrates the synthesis, coordination geometry, and methyl abstraction pathways of beta-diketiminato aluminum complexes, highlighting steric effects on organometallic stability.

Key Points

To synthesize and characterize mono- and dialkyl β-diketiminato aluminum complexes and examine their reactivity toward methyl abstraction reagents.
Prepared β-diketiminato aluminum complexes via reactions of aluminum trichloride or trimethylaluminum with tolyl- and 2,6-diisopropylphenyl-substituted β-diketimine ligands.
Conducted alkylation with alkyllithium reagents and methyl abstraction using tris(pentafluorophenyl)borane or silver triflate.
Determined solid-state coordination geometries and planar ligand conformations using single-crystal X-ray crystallography.
Sequential alkylation of (TTP)AlCl2 with methyllithium formed mono- and dimethyl derivatives, while bulkier alkyllithium reagents yielded exclusively monoalkyl complexes.
Methyl abstraction from (TTP)AlMe2 using B(C6F5)3 generated unstable cationic intermediates decomposing to (TTP)Al(CH3)(C6F5), whereas AgOTf produced a thermally stable triflate adduct inert to Lewis bases.
Crystallographic analyses confirmed planar β-diketiminato backbones across four complexes, with the pseudotetrahedral aluminum center displaced 0.72 Å from the ligand plane in (DDP)Al(CH3)2.

Cite This Study

Qian et al. (1998) studied this question.

synapsesocial.com/papers/6a8ba2925ef9ff12d7894624 https://doi.org/10.1021/om970886o

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Implication

Experimental study demonstrates the synthesis, coordination geometry, and methyl abstraction pathways of beta-diketiminato aluminum complexes, highlighting steric effects on organometallic stability.

Synthesis, Structure, and Reactivity of β-Diketiminato Aluminum Complexes

Discussion

Member takes

Implication

Key Points

Cite This Study

Synthesis, Structure, and Reactivity of β-Diketiminato Aluminum Complexes

Discussion

Member takes

Implication

Key Points

Cite This Study

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