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Issue 11, 2005
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Organoaluminium complexes incorporating an amido phosphine chelate with a pendant amine arm

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Abstract

The palladium-catalyzed aryl amination of 1-bromo-2-fluorobenzene with N,N-dimethylethylenediamine quantitatively produces N-(dimethylaminoethyl)-2-fluoroaniline, which subsequently reacts with KPPh2 in 1,4-dioxane to afford N-(dimethylaminoethyl)-2-diphenylphosphinoaniline (H[PNN]). The reactions of trialkylaluminium with H[PNN] in toluene generate the corresponding aluminium dialkyl complexes [PNN]AlR2 (R = Me, Et, i-Bu). The solution NMR spectroscopic and X-ray crystallographic studies are indicative of a trigonal bipyramidal geometry for these aluminium complexes in which the amino nitrogen atom is trans to the phosphorus donor of the [PNN] ligand. This study presents rare examples of structurally characterized, five-coordinate aluminium hydrocarbyl complexes supported by phosphine-derived ligands.

Graphical abstract: Organoaluminium complexes incorporating an amido phosphine chelate with a pendant amine arm

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Publication details

The article was received on 25 Feb 2005, accepted on 19 Apr 2005 and first published on 29 Apr 2005


Article type: Paper
DOI: 10.1039/B502873F
Citation: Dalton Trans., 2005,0, 1952-1956
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    Organoaluminium complexes incorporating an amido phosphine chelate with a pendant amine arm

    W. Lee and L. Liang, Dalton Trans., 2005, 0, 1952
    DOI: 10.1039/B502873F

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