Lord of the Dance Dynamic
hydrogen-
bonding interactions and spin-transition behavior play a key role in stabilizing intermediate phases in a multi-step spin transition. In their Communication on
page 595 ff., M. Nihei, H. Oshio, et al. present a
hydrogen-
bonding donor–acceptor system, comprising a spin transition-active square complex [Co
2Fe
2] and aromatic
hydrogen-bond-donor molecules, which exhibits a three-step spin transition in response to temperature.