Single Crystal-to-Single Crystal Irreversible Transformation from a Discrete Vanadium(V)-Alcoholate to an Aldehydic-Vanadium(IV) Oligomer

摘要

An unprecedented single crystal-to-single crystal transformation occurs when a binuclear oxovanadium(V) compound [V~V_2O_2(L)_2] 1 involving 2,6-bis(hydroxymethyl)-p-cresol (H_3L) as a bridging ligand is exposed simultaneously to white light and aerial oxygen to generate an oligomeric compound [VIV_2O_2(L~*)_2] 2 (H_2L~* is 3-hydroxymethyl-5-methylsalicylaldehyde). Each va-nadium(V) center in 1 is reduced to vanadium(IV) in 2 at the expense of a two-electron alcohol-to-aldehyde oxidation in the coordinated ligand. The additional electron being released is possibly consumed by molecular oxygen to generate hydrogen peroxide.