A type of molecular magnetism that is the result of electronic instability (see electronic stability
) caused by external constraints (temperature, pressure, or electromagnetic radiation), which induce structural changes at molecular and lattice levels. The phenomenon is most characteristic of first-row transition metal complexes, e g,.
An example of spin-crossover complexes (the term of spin-state isomers is also used) is
(2-pic = 2-picolylamine).
the complex has an electronic low-spin state
), whereas stretching the bond up to
induces the transition to a high-spin
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook