1. (a) S. A. Cotton, Coord. Chem. Rev., 1997, 160, 93; (b) F. T. Edelmann, D. M. M. Freckmann and H. Schumann, Chem. Rev., 2002, 102, 1851; (c) R. Litlabø, M. Zimmermann, K. Saliu, J. Takats, K. W. Törnroos and R. Anwander, Angew. Chem., Int. Ed., 2008, 47, 9560; (d) M. Nishiura and Z. Hou, Nat. Chem., 2010, 2, 257; (e) W. Fegler, A. Venugopal, M. Kramer and J. Okuda, Angew. Chem., Int. Ed., 2015, 54, 1724; (f) J. Okuda, Coord. Chem. Rev., 2017, 340, 2; (g) D. Schädle and R. Anwander, Chem. Soc. Rev., 2019, 48, 5752; (h) L. Giusti, V. R. Landaeta, M. Vanni, J. A. Kelly, R. Wolf and M. Caporali, Coord. Chem. Rev., 2021, 441, 213927; (i) Y. Guan, E. Lu and X. Xu, J. Rare Earths, 2021, 39, 1017; (j) F. Ortu, Chem. Rev., 2022, 122, 6040.
2. (a) A. A. Trifonov, Coord. Chem. Rev., 2010, 254, 1327
3. (b)M. Zimmermann and R. Anwander, Chem. Rev., 2010, 110, 6194
4. (c)M. Nishiura, F. Guo and Z. Hou, Acc. Chem. Res., 2015, 48, 2209
5. (d)A. A. Trifonov and D. M. Lyubov, Coord. Chem. Rev., 2017, 254, 1327