Unexpected C-F activation during redox transmetallation with silver N,N '-bis(2,6-difluorophenyl)formamidinate
Journal Publication ResearchOnline@JCUAbstract
The trivalent lanthanoid formamidinates, [Yb-2(DFForm)(4)F-2(py)(2)]center dot CH3CN (1) (DFForm=N,N'-bis(2,6-difluorophenyl)formamidinate), and [La-6(DFForm)(8)F8O(CH3CN)(2)].6CH(3)CN (2) have been prepared from redox transmetallation (RT) reactions employing lanthanoid metals and silver formamidinate (AgDFForm) in CH3CN. C-F activation was observed in both reactions. The structure of 1 is a fluorine bridged dimer with two seven-coordinate ytterbium metal ions. Surprisingly the lanthanum complex is a trivalent cage with an unexpected central oxygen atom. [La-6(DFForm)(8)F8O(CH3CN)(2)].6CH(3)CN (2) formed a 15 membered ring cage of six La atoms, eight F and one O at the centre. There are three different La3+ ions in 2 with two different coordination numbers. All the La atoms are coordinated by four bridging fluorides and the central oxygen.
Journal
Zeitschrift fuer Anorganische und Allgemeine Chemie
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Volume
648
ISBN/ISSN
1521-3749
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Issue
19
Pages Count
6
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Publisher
Wiley-Blackwell
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DOI
10.1002/zaac.202200189