In our Review, we described only work of D. M. Adams et al. (J. Am. Chem. Soc.1993, 115, 8221–8229) as an example of solid-state valence tautomerism (p. 2154). However, we should note that solid-state valence tautomerism has also been reported by G. A. Abakumov et al. (Dokl. Akad. Nauk SSSR1993, 328, 332–335). Furthermore, the pioneering works of G. A. Abakumov et al. in which metal–ligand electron transfer in o-semiquinonic copper complexes was first reported are not cited (Dokl. Akad. Nauk SSSR1982, 266, 361–363; Dokl. Akad. Nauk SSSR1989, 304, 107–111).
It has been suggested that our interpretation of photomechanical effects on p. 2158 is wrong. We proposed that bending is induced by the expansion of the irradiated region of the crystals. If this were the case, irradiation of the opposite side of the crystal should cause bending in the other direction. However, the crystal actually bends according to its own axis, and the bending is independent of the side from which the crystal is irradiated.
Furthermore, the title of Chapter 3.1 on p. 2162 should read “Metal-to-Metal Charge Transfer in FeCo Pentanuclear Compounds”.