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Updated: Dec 1, 2025

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
Published on: April 19, 2019
Donor-Stabilized Monocarba-Bridged Bis(cyclopentadienyl)alanes
Wasim Haider1, Volker Huch1, Bernd Morgenstern1
1Faculty of Natural Sciences and Technology, Department of Chemistry, Saarland University, 66123, Saarbrücken, Saarland, Federal Republic of Germany.
Abstract:
Five monocarba-bridged bis(cyclopentadienyl)aluminum halide NHC and thione complexes and one monocarba-bridged bis(cyclopentadienyl)phosphanylalane NHC complex are reported. The former were synthesized by transmetalation of a C[1]magnesocenophane with the corresponding aluminum(III) chloride and aluminum(III) bromide donor adducts. The phosphanylalane complex was obtained by a subsequent functionalization of the corresponding bromoalane with lithium diphenylphosphide. All complexes were characterized in solution by multinuclear NMR spectroscopy and in the solid state by single crystal X-ray diffraction. Bonding energies of the NHC and thione ligands to the aluminum centres were estimated by DFT calculations.
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