1. (a) Romary, J.K.; Bunds, J.E.; Barger, J.D. J. Chem. Eng. Data1967, 12, 224; (b) Anderegg, G.; Wenk, F. Helv. Chim. Acta. 1967, 50, 2330.
2. (a) Romary, J.K.; Barger, J.D.; Bunds, J.E. Inorg. Chem.1968, 7, 1142; (b) Anderegg, G.; Hubmann, E.; Podder, N.G.; Wenk, F. Helv. Chim. Acta.1977, 60, 123.
3. (a) Allen, C.S.; Chuang, C.L.; Cornebise, M.; Canary, J.W. Inorg. Chim. Acta. 1995, 239, 29; (b) Blackman, A. Polyhedron2005, 24, 1.
4. (a) O'Neil, E.J.; Smith, B.D. Coord. Chem. Rev.2006, 250, 3068; (b) Kruppa, M.; König, B. Chem. Rev.2006, 106, 3520; (c) Sakamoto, T.; Ojida, A.; Hamachi, I. Chem. Commun.2009, 141; (d) Kim, S.K.; Lee, D.H.; Hong, J.I.; Yoon, J. Acc. Chem. Res.2009, 42, 23; (e) Ngo, H.T.; Liu, X.; Jolliffe, K.A. Chem. Soc. Rev.2012, 41, 4928.
5. (a) Rosenthal, J.; Lippard, S.J. J. Am. Chem. Soc.2010, 132, 5536; (b) Royzen, M.; Wilson, J.J.; Lippard, S.J. J. Inorg. Biochem.2012, 118, 162.