New Reactions of Cyclopentadienylnickel Chelates with Secondary Phosphane Tethers

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Original languageEnglish
Pages (from-to)2120-2132
Number of pages13
JournalEuropean Journal of Inorganic Chemistry
Volume2021
Issue number22
Early online date14 Apr 2021
Publication statusPublished - 8 Jun 2021

Abstract

In continuation of our research in cyclopentadienylalkylphosphane nickel chelates with secondary phosphane tethers the first cationic representatives of this class of compounds are reported. These were obtained by reaction of the respective bromo complex with tris(4-trifluoromethylphenyl)phosphane as well as with a number of alkyl and aryl isonitriles in the presence of indium tribromide. This Lewis acid is crucial for the success of the reactions leading to the respective tetrabromoindate salts. The compounds were characterized spectroscopically, including rare 14N, 13C couplings being observed. Finally, deprotonation experiments are reported, which provide some evidence for deprotonation taking place, although the expected phosphinidene chelates could not be isolated due to rapid decomposition.

Keywords

    Chelates, Cyclopentadienyl ligands, Indium, Nickel, Phosphane ligands

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New Reactions of Cyclopentadienylnickel Chelates with Secondary Phosphane Tethers. / Heinisch, Sandra Lauren; Werner, Irina; Butenschön, Holger.
In: European Journal of Inorganic Chemistry, Vol. 2021, No. 22, 08.06.2021, p. 2120-2132.

Research output: Contribution to journalArticleResearchpeer review

Heinisch SL, Werner I, Butenschön H. New Reactions of Cyclopentadienylnickel Chelates with Secondary Phosphane Tethers. European Journal of Inorganic Chemistry. 2021 Jun 8;2021(22):2120-2132. Epub 2021 Apr 14. doi: 10.1002/ejic.202100147
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abstract = "In continuation of our research in cyclopentadienylalkylphosphane nickel chelates with secondary phosphane tethers the first cationic representatives of this class of compounds are reported. These were obtained by reaction of the respective bromo complex with tris(4-trifluoromethylphenyl)phosphane as well as with a number of alkyl and aryl isonitriles in the presence of indium tribromide. This Lewis acid is crucial for the success of the reactions leading to the respective tetrabromoindate salts. The compounds were characterized spectroscopically, including rare 14N, 13C couplings being observed. Finally, deprotonation experiments are reported, which provide some evidence for deprotonation taking place, although the expected phosphinidene chelates could not be isolated due to rapid decomposition. ",
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AU - Heinisch, Sandra Lauren

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AU - Butenschön, Holger

N1 - Funding Information: We thank the Deutsche Forschungsgemeinschaft (DFG) for generous support of this project (DFG BU814 20–1, 20–2). We are indebted to Dr. Gerald Dräger, Institut für Organische Chemie, Leibniz Universität Hannover, for performing the crystallographic analyses. Open access funding enabled and organized by Projekt DEAL.

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AB - In continuation of our research in cyclopentadienylalkylphosphane nickel chelates with secondary phosphane tethers the first cationic representatives of this class of compounds are reported. These were obtained by reaction of the respective bromo complex with tris(4-trifluoromethylphenyl)phosphane as well as with a number of alkyl and aryl isonitriles in the presence of indium tribromide. This Lewis acid is crucial for the success of the reactions leading to the respective tetrabromoindate salts. The compounds were characterized spectroscopically, including rare 14N, 13C couplings being observed. Finally, deprotonation experiments are reported, which provide some evidence for deprotonation taking place, although the expected phosphinidene chelates could not be isolated due to rapid decomposition.

KW - Chelates

KW - Cyclopentadienyl ligands

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