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research article

Stabilization of molecular LiF and LiFHF inside metallamacrocyclic hosts

Lehaire, ML  
•
Scopelliti, R  
•
Severin, K  
2002
Inorganic Chemistry

Complexes of molecular LiF and LiFHF were synthesized using the metallamacrocyclic receptors (cymene)Ru-(C5H3NO2) (1), (CpRh)-Rh-*(C5H3NO2) (2), and (CpIr)-Ir-*(C5H3NO2) (3). LiBF4 complexes of 1-3 were prepared and subsequently treated with F- or FHF- to give the desired products in an anion-exchange reaction. All complexes were characterized by multinuclear NMR spectroscopy (H-1, C-13, F-19, Li-7). Strong scalar coupling between Li-7 and F-19 is observed for the LiF and the LiFHF complexes ((1)J(LiF) = 91-103 Hz). The LiFHF adduct of 1 displays fluxional behavior with fast exchange of the two fluorine atoms. The structures of the complexes 1.LiBF4, 2.LiBF4, 1.LiF, 2-LiF, 1-LiFHF, and 3-LiFHF were determined by single-crystal X-ray analysis. Li-F bond lengths between 1.77 and 1.81 Angstrom were found. The LiFHF complexes show a hydrogen difluoride anion coordinated in a bent fashion via one fluorine atom to the lithium ion.

  • Details
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Type
research article
DOI
10.1021/ic025749k
Web of Science ID

WOS:000178676700021

Author(s)
Lehaire, ML  
Scopelliti, R  
Severin, K  
Date Issued

2002

Published in
Inorganic Chemistry
Volume

41

Issue

21

Start page

5466

End page

5474

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCS  
Available on Infoscience
February 9, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/222318
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