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

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

Dalton Trans. 2024 Mar 26;53(13):5932-5946. doi: 10.1039/d4dt00244j.

Authors

Luis Werner¹, Julika Hagn¹, Alexander Gerstner¹, Udo Radius¹

Affiliation

¹ Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. u.radius@uni-wuerzburg.de.

PMID: 38456748
DOI: 10.1039/d4dt00244j

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.