Reichl, Stephan and Riesinger, Christoph and Scheer, Manfred (2023) Nucleophilic Attack at Pentaarsaferrocene [Cp*Fe(η5-As5)]—The Way to Larger Polyarsenide Ligands. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 62 (36). e202307696. ISSN 1433-7851, 1521-3773
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By the reaction of [Cp*Fe(eta(5)-As-5)] (I) (Cp*=C5Me5) with main group nucleophiles, unique functionalized products with eta(4)-coordinated polyarsenide (As-n) units (n=5, 6, 20) are obtained. With carbon-based nucleophiles such as MeLi or KBn (Bn=CH2Ph), the anionic organo-substituted polyarsenide complexes, [Li(2.2.2-cryptand)][Cp*Fe(eta(4)-As5Me)] (1a) and [K(2.2.2-cryptand)][Cp*Fe{eta(4)-As-5(CH2Ph)}] (1b), are accessible. The use of KAsPh2 leads to a selective and controlled extension of the As-5 unit and the formation of the monoanionic compound [K(2.2.2-cryptand][Cp*Fe(eta(4)-As6Ph2)] (2). When I is reacted with [M]As(SiMe3)(2) (M=Li center dot THF; K), the formation of the largest known anionic polyarsenide unit in [M'(2.2.2-cryptand)](2)[(Cp*Fe)(4){mu(5)-eta(4):eta(4):eta(3):eta(3):eta(1):eta(1)-As-20}] (3) occurred (M'=Li (3a), K (3b)).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BOND COVALENT RADII; COMPLEXES; PENTAPHOSPHAFERROCENE; REACTIVITY; Arsenic; Functionalization; Iron; Nucleophiles; Polyarsenide Units |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Feb 2024 09:22 |
| Last Modified: | 22 Feb 2024 09:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/59051 |
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