Electrophilic Ln(III) cations protected by C-F â Ln interactions and their coordination chemistry with weak σ- and π-donors.
Inorg Chem
; 52(14): 8234-43, 2013 Jul 15.
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| ID: mdl-23802923
ABSTRACT
A homoleptic cerium(III) amide complex, Ce(NPh(F)2)3 (1-Ce) (Ph(F) = pentafluorophenyl), in an unusual pseudo-trigonal planar geometry featuring six C-F â Ce interactions was prepared. The C-F â Ln interactions in solution were evident by comparison of the (19)F NMR shifts for the paramagnetic 1-Ce with those of the 4f(0) lanthanum(III) analogue. Coordination of weak σ- and π-donors, including ethers and neutral arene molecules, was achieved by the reversible displacement of the weak C-F â Ce interactions. Computational studies on Ce(NPh(F)2)3 and Ce(NPh(F)2)3(η(6)-C6H3Me3) provide information on the F â Ce interactions and Ce-η(6)-arene bonding.
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2013
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