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In liquid solution at room temperature, an excitation with <jats:italic>\u03bb<\/jats:italic>=355\u2005nm light resulted in the loss of one CO ligand, which is cleaved from a basal metal\u2010coordination site. Within the time resolution of the experiment, a solvent molecule promptly refills the resultant vacancy at the coordinatively unsaturated metal center. In the weakly interacting liquid, dichloromethane, the counterion of the complex is subsequently able to substitute the solvent in the coordination sphere of the iron center, thereby forming as a stable product a neutral dicarbonyl tetrafluoroborato iron(0) species containing a four\u2010membered ferracycle.<\/jats:p>","DOI":"10.1002\/chem.201503300","type":"journal-article","created":{"date-parts":[[2015,10,13]],"date-time":"2015-10-13T05:26:40Z","timestamp":1444714000000},"page":"17184-17190","source":"Crossref","is-referenced-by-count":10,"title":["Photochemistry of a Puckered Ferracyclobutadiene in Liquid Solution Studied by Time\u2010Resolved Fourier\u2010Transform Infrared 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