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Aromatic ligands have provided a wealth of interesting organometallic complexes of f-elements, namely featuring cyclopentadienyl (Cp, C5H5-) or cyclooctatetraenyl (Cot, C8H82-) frameworks.[1,2] In recent years, this area has been expanded to include the cyclononatetraenyl (Cnt, C9H9-) ligand, which exhibits unique coordination modes to late lanthanide centres of the general form Ln(Cnt)3 (Ln = Gd to Tm),[3] and Ln(Cnt)2 (Ln = Sm, Eu and Yb).[4] We have since extended our work to include a 10-carbon scaffold ligand, utilising a methano-bridged C10 annulene (C10, C11H102-) (Figure 1), in an attempt to synthesise homobimetallic lanthanide complexes that can facilitate short Ln-Ln distances.
[1] W. J. Evans, Organometallics; 2016; 35; 3088-3100
[2] F. Mares, K. Hodgson, A. Streitwieser, J. Organomet. Chem.; 1970; 24; C68-C70
[3] O. Stetsuik, L. La Droitte, V. Goudy, B. Le Guennic, O. Cador, G. Nocton, Organometallics; 2022; 41; 133-140
[4] M. Xémard, S. Zimmer, M. Cordier, V. Goudy, L. Ricard, C. Clavaguéra, G. Nocton, J. Am. Chem. Soc.; 2018; 140; 14433-14439
