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08:46
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
8.3K
Unique Group 1 cations stabilised by homoleptic neutral phosphine coordination
Marina Carravetta1, Maria Concistre, William Levason
1Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK. G.Reid@soton.ac.uk.
Chemical Communications (Cambridge, England)
|May 15, 2015
Summary
Researchers coordinated neutral diphosphines to lithium and sodium cations using
Area of Science:
- Coordination chemistry
- Organometallic chemistry
- Inorganic chemistry
Background:
- Neutral diphosphines are versatile ligands in coordination chemistry.
- Alkali metal cations (Li+, Na+) typically coordinate with anionic or polar ligands.
- Achieving homoleptic coordination with neutral ligands to alkali metals presents challenges.
Purpose of the Study:
- To achieve homoleptic coordination of neutral diphosphines to Li(+) and Na(+) cations.
- To characterize the resulting coordination complexes.
- To explore the coordination behavior of 'naked' alkali metal cations.
Main Methods:
- Synthesis of homoleptic complexes using 'naked' cation sources: Li[Al{OC(CF3)3}4] and Na[B{3,5-(CF3)2-C6H3}4].
- Characterization using X-ray crystallography.
- Solid-state and solution multinuclear Nuclear Magnetic Resonance (NMR) spectroscopy.
Main Results:
- Successful homoleptic coordination of diphosphines Me2P(CH2)2PMe2 and o-C6H4(PMe2)2 to Li(+) and Na(+) cations.
- Formation of unique species with distorted octahedral coordination geometry.
- Coordination occurs exclusively through the chelating diphosphine ligands.
Conclusions:
- Demonstrated a novel method for synthesizing homoleptic alkali metal diphosphine complexes.
- Highlighted the utility of 'naked' alkali metal cation sources in coordination chemistry.
- Revealed unique coordination modes and structures in these systems.
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