Front Cover: Photochemical Synthesis of cis,trans,cis‐1,2,3,4‐Tetrakis(diphenylphosphanyl)buta‐1,3‐diene and Its Metal Coordination (Eur. J. Inorg. Chem. 46/2018)

The Front Cover shows the important steps of the synthesis of dppbd. After the formation of the initial intermediate, comes the second and key step, which is a light induced pericyclic cycloaddition, immediately followed by a thermally induced ring opening reaction. The third step is the removal of platinum, which was used as a template. The last step shows two examples of the coordination of metal centers. In the background is an excitation/emission spectrum of a compound consisting of osmium and the title compound, demonstrating its application as a photosensitizer. More information can be found in the Full Paper by W. Oberhauser, G. Knör, P. Brüggeller et al. For more on the story behind the cover research, see the Cover Profile.