The Parent Diarsene HAs=AsH as Side‐on Bound Ligand in an Iron Carbonyl Complex

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‐As2H2)] (2) is reported, containing a parent diarsene as unprecedente...

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Veröffentlicht in:Angewandte Chemie 2019-11, Vol.131 (45), p.16238-16242
Hauptverfasser: Rund, Reinhard, Balázs, Gábor, Bodensteiner, Michael, Scheer, Manfred
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Balázs, Gábor
Bodensteiner, Michael
Scheer, Manfred
description 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‐As2H2)] (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‐As2D2)] (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)4AsHW(CO)5]2 (3) and [{Fe(CO)4}2AsH{Cr(CO)5}] (4), respectively. Schwer fassbares HAs=AsH, das schwere Analogon von Ethylen, wurde ohne kinetische Stabilisierung durch einen 3d‐Übergangsmetallkomplex koordiniert. Durch Methanolyse von [{Fe(CO)4}As(SiMe3)3] wurde der Komplex [{Fe(CO)4}{η2‐As2H2}] synthetisiert. DFT‐Rechnungen zeigen, dass der Bindungsmodus am besten mit dem Dewar‐Chatt‐Duncanson‐Modell beschrieben werden kann. Anschließende Reaktivitätsstudien zeigten, dass es als AsH‐Transferreagenz reagiert.
doi_str_mv 10.1002/ange.201909423
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Herein, by the methanolysis of [{Fe(CO)4}As(SiMe3)3] (1) the synthesis of [{Fe(CO)4}(η2‐As2H2)] (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‐As2D2)] (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)4AsHW(CO)5]2 (3) and [{Fe(CO)4}2AsH{Cr(CO)5}] (4), respectively. Schwer fassbares HAs=AsH, das schwere Analogon von Ethylen, wurde ohne kinetische Stabilisierung durch einen 3d‐Übergangsmetallkomplex koordiniert. Durch Methanolyse von [{Fe(CO)4}As(SiMe3)3] wurde der Komplex [{Fe(CO)4}{η2‐As2H2}] synthetisiert. 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Herein, by the methanolysis of [{Fe(CO)4}As(SiMe3)3] (1) the synthesis of [{Fe(CO)4}(η2‐As2H2)] (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‐As2D2)] (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)4AsHW(CO)5]2 (3) and [{Fe(CO)4}2AsH{Cr(CO)5}] (4), respectively. Schwer fassbares HAs=AsH, das schwere Analogon von Ethylen, wurde ohne kinetische Stabilisierung durch einen 3d‐Übergangsmetallkomplex koordiniert. Durch Methanolyse von [{Fe(CO)4}As(SiMe3)3] wurde der Komplex [{Fe(CO)4}{η2‐As2H2}] synthetisiert. DFT‐Rechnungen zeigen, dass der Bindungsmodus am besten mit dem Dewar‐Chatt‐Duncanson‐Modell beschrieben werden kann. 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Herein, by the methanolysis of [{Fe(CO)4}As(SiMe3)3] (1) the synthesis of [{Fe(CO)4}(η2‐As2H2)] (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‐As2D2)] (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)4AsHW(CO)5]2 (3) and [{Fe(CO)4}2AsH{Cr(CO)5}] (4), respectively. Schwer fassbares HAs=AsH, das schwere Analogon von Ethylen, wurde ohne kinetische Stabilisierung durch einen 3d‐Übergangsmetallkomplex koordiniert. Durch Methanolyse von [{Fe(CO)4}As(SiMe3)3] wurde der Komplex [{Fe(CO)4}{η2‐As2H2}] synthetisiert. DFT‐Rechnungen zeigen, dass der Bindungsmodus am besten mit dem Dewar‐Chatt‐Duncanson‐Modell beschrieben werden kann. Anschließende Reaktivitätsstudien zeigten, dass es als AsH‐Transferreagenz reagiert.</abstract><cop>Weinheim</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/ange.201909423</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0003-2182-5020</orcidid><oa>free_for_read</oa></addata></record>
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source Wiley Online Library Journals Frontfile Complete
subjects Arsen
Ashes
Bonding
Carbonyl compounds
Carbonyls
Chemistry
Chrom
Chromium
Diarsen
Eisen
Electronic structure
Ethene
Ethylene
Iron
Ligands
Methanolysis
Tungsten
Wolfram
title The Parent Diarsene HAs=AsH as Side‐on Bound Ligand in an Iron Carbonyl Complex
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