1. Controversy exists in naming sandwich organometallic actinide and lanthanide compounds of cyclooctatetraene dianion; [8]annulene dianion and [8]annulene-metal(X) complex are chosen here because these names properly describe the derealization of charge in the ligand and also emphasize the formal oxidation state of the metal in the complex.
2. Streitwieser, A., Jr.; Muller-Westerhoff, U. J. Am. Chem. Soc. 1968, 90, 7364.
3. Streitwieser, A., Jr.; Muler-Westerhoff, U.; Sonnichsen, G.; Mares, F.; Morrell, D.G.; Hodgson, K.O. J. Am. Chem. Soc. 1973, 95, 8644.
4. Streitwieser, A., Jr.; Harmon, C.A. Inorg. Chem. 1973, 12, 1102.
5. Karraker, D.G. Inorg. Chem. 1973, 12, 1105.