Synergic deprotonation generates alkali-metal salts of tethered fluorenide NHC ligands co-complexed to alkali metal amides

Kieren James Evans; Stephen M. Mansell

doi:10.1002/chem.201806278

Synergic deprotonation generates alkali-metal salts of tethered fluorenide NHC ligands co-complexed to alkali metal amides

Kieren James Evans, Stephen M. Mansell

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11 Citations (Scopus)

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Abstract

Synergic combinations of alkali-metal hydrocarbyl/amide reagents were used to synthesise saturated N-heterocyclic carbene (NHC) ligands tethered to a fluorenide anion through deprotonation of a spirocyclic precursor, whereas conventional bases were not successful. The Li₂ derivatives displayed a bridging amide between two Li atoms within the fluorenide-NHC pocket, whereas the Na₂ and K₂ analogues displayed extended solid-state structures with the fluorenide-NHC ligand chelating one alkali metal centre.

Original language	English
Pages (from-to)	3766-3769
Number of pages	4
Journal	Chemistry - A European Journal
Volume	25
Issue number	15
Early online date	22 Jan 2019
DOIs	https://doi.org/10.1002/chem.201806278
Publication status	Published - 12 Mar 2019

Keywords

alkali metals
bimetallic base
carbene ligands
metalation

ASJC Scopus subject areas

Catalysis
Organic Chemistry

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10.1002/chem.201806278Licence: CC BY

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abstract = "Synergic combinations of alkali-metal hydrocarbyl/amide reagents were used to synthesise saturated N-heterocyclic carbene (NHC) ligands tethered to a fluorenide anion through deprotonation of a spirocyclic precursor, whereas conventional bases were not successful. The Li2 derivatives displayed a bridging amide between two Li atoms within the fluorenide-NHC pocket, whereas the Na2 and K2 analogues displayed extended solid-state structures with the fluorenide-NHC ligand chelating one alkali metal centre. ",

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N2 - Synergic combinations of alkali-metal hydrocarbyl/amide reagents were used to synthesise saturated N-heterocyclic carbene (NHC) ligands tethered to a fluorenide anion through deprotonation of a spirocyclic precursor, whereas conventional bases were not successful. The Li2 derivatives displayed a bridging amide between two Li atoms within the fluorenide-NHC pocket, whereas the Na2 and K2 analogues displayed extended solid-state structures with the fluorenide-NHC ligand chelating one alkali metal centre.

AB - Synergic combinations of alkali-metal hydrocarbyl/amide reagents were used to synthesise saturated N-heterocyclic carbene (NHC) ligands tethered to a fluorenide anion through deprotonation of a spirocyclic precursor, whereas conventional bases were not successful. The Li2 derivatives displayed a bridging amide between two Li atoms within the fluorenide-NHC pocket, whereas the Na2 and K2 analogues displayed extended solid-state structures with the fluorenide-NHC ligand chelating one alkali metal centre.

KW - alkali metals

KW - bimetallic base

KW - carbene ligands

KW - metalation

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Synergic deprotonation generates alkali-metal salts of tethered fluorenide NHC ligands co-complexed to alkali metal amides

Abstract

Keywords

ASJC Scopus subject areas

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NMR data supporting the publication: Synergic deprotonation generates alkali‐metal salts of tethered fluorenide‐NHC ligands co‐complexed to alkali‐metal amides

Stephen M. Mansell

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Synergic deprotonation generates alkali-metal salts of tethered fluorenide NHC ligands co-complexed to alkali metal amides

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

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NMR data supporting the publication: Synergic deprotonation generates alkali‐metal salts of tethered fluorenide‐NHC ligands co‐complexed to alkali‐metal amides

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Stephen M. Mansell

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