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.

中文翻译：

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封面：顺式，反式，顺式，1,2,3,4-四（二苯基膦基）丁1,3-二烯的光化学合成及其金属配位（Eur.J.Inorg.Chem.46 / 2018）

封面显示了合成dppbd的重要步骤。形成初始中间体后，进入第二个关键步骤，即光诱导的环周加成反应，然后立即进行热诱导的开环反应。第三步是去除用作模板的铂。最后一步显示了金属中心协调的两个示例。背景是由和标题化合物组成的化合物的激发/发射光谱，证明了其作为光敏剂的应用。有关更多信息，请参见W. Oberhauser，G。Knör，P。Brüggeller等的《全文》。有关封面研究背后的故事的更多信息，请参见封面资料。