Synthesis, characterization and reactivity of an imidazolin-2-iminato aluminium dihydride

Daniel Franz, Elisabeth Irran, Shigeyoshi Inoue

Research output: Contribution to journalArticlepeer-review

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The reaction of bis(2,6-diisopropylphenyl)imidazolin-2-imine (LH, 1) with Me3N·AlH3 furnishes {μ-LAlH2} 2 (2). The marked tendency of 2 to release its hydride substituents is ascribed to the strong electron-donor character of the imidazolin-2-iminato ligand. This is supported by its reactivity study and DFT calculations. In fact, compound 2 was further converted with Me3SiOTf, Me 2S·BH3, Me2S·BBr3, and BX3 (with X = Cl, Br, and I) into {μ-LAl(H)OTf}2 (3), {μ-LAl(BH4)2}2 (4), and {μ-LAlX 2}2 (5, X = Br; 6, X = Cl; 7, X = I), respectively. For all new aluminium complexes the formulation as dimers was evidenced by high resolution mass spectrometry, as well as single-crystal X-ray diffraction analysis. A prominent structural motif of these compounds is the square-planar four-membered Al2N2 ring with two bridging bulky imidazolin-2-imino moieties.

Original languageEnglish
Pages (from-to)4451-4461
Number of pages11
JournalDalton Transactions
Issue number11
StatePublished - 21 Mar 2014
Externally publishedYes


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