NHC-ligated indenyl- and fluorenyl-substituted Alanes and Gallanes: synthons towards indenyl- and fluorenyl-bridged (AlC)n-heterocycles (n = 2,3)

Luis Werner; Julika Hagn; Alexander Gerstner; Udo Radius

doi:10.1039/D4DT00244J

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NHC-ligated indenyl- and fluorenyl-substituted Alanes and Gallanes: synthons towards indenyl- and fluorenyl-bridged (AlC)_n-heterocycles (n = 2,3)†

Luis Werner,^a Julika Hagn,^a Alexander Gerstner^a and Udo Radius

*^a

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* Corresponding authors

^a Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
E-mail: u.radius@uni-wuerzburg.de

Abstract

Indenyl-(Ind) and fluorenyl-(Fl) substituted NHC-stabilized alanes and gallanes (NHC)·EH₂R 1–12 (NHC = IiPr^Me, IiPr, IMe^Me; E = Al, Ga; R = Ind, Fl) were prepared via reaction of the corresponding NHC-iodoalanes and -gallanes with LiInd and LiFl, respectively. Analogously, the alane adducts with two Ind/Fl substituents (NHC)·AlHR₂13–18 (NHC = IiPr^Me, IiPr, IMe^Me; R = Ind, Fl) were obtained by using two equivalents of LiInd/LiFl. Elimination of indene and fluorene was induced thermally affording unusual dimeric and trimeric NHC-alane adducts {(NHC)·AlH₂}₂-μ-Fl 19–20 and {(NHC)·AlH-μ-R}_n21–23 (R = Ind, Fl; n = 2, 3) with bridging indenyl and fluorenyl ligands.

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Article information

DOI: https://doi.org/10.1039/D4DT00244J
Article type: Paper
Submitted: 26 Jan 2024
Accepted: 01 Mar 2024
First published: 04 Mar 2024

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Dalton Trans., 2024,53, 5932-5946

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NHC-ligated indenyl- and fluorenyl-substituted Alanes and Gallanes: synthons towards indenyl- and fluorenyl-bridged (AlC)_n-heterocycles (n = 2,3)

L. Werner, J. Hagn, A. Gerstner and U. Radius, Dalton Trans., 2024, 53, 5932 DOI: 10.1039/D4DT00244J

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