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Updated: Jan 20, 2026
Removal and Replacement of Endogenous Ligands from Lipid-Bound Proteins and Allergens
Published on: February 24, 2021
The Parent Diarsene HAs=AsH as Side-on Bound Ligand in an Iron Carbonyl Complex
Reinhard Rund1, Gábor Balázs1, Michael Bodensteiner1
1Institute of Inorganic Chemistry, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany.
Abstract:
The terminal diarsene HAs=AsH ligand attracts special interest concerning its bonding relation in comparison to its isolable relative, ethene. Herein, by the methanolysis of [{Fe(CO)4 }As(SiMe3 )3 ] (1) the synthesis of [{Fe(CO)4 }(η2 -As2 H2 )] (2) is reported, containing a parent diarsene as unprecedented side-on coordinated ligand. Following this synthetic route, also the D-labeled complex [{Fe(CO)4 }(η2 -As2 D2 )] (2D) could be isolated. The electronic structure and bonding situation of 2 was elucidated by DFT calculations revealing that 2 is best described as an olefin-like complex. Moreover, the reactivity of 2 towards the Lewis acids [{M(CO)5 }(thf)] (M=Cr, W) was investigated, leading to the complexes [Fe(CO)4 AsHW(CO)5 ]2 (3) and [{Fe(CO)4 }2 AsH{Cr(CO)5 }] (4), respectively.
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