Cover Picture: From Allenes to Tetracenes: A Synthetic and Structural Study of Silyl‐ and Halo‐Allenes and Their Dimers (Eur. J. Org. Chem. 16/2007)

Abstract The cover picture shows the entrance to the World Heritage Site at Newgrange, a 5000‐year‐old Neolithic passage tomb, situated near Dublin. The background depicts a twofold symmetric spiral engraving on the entrance stone and provides an appropriate motif for the sequential transformation of 9‐(trimethylsilylethynyl)‐9 H ‐fluoren‐9‐ol, via 3,3‐(biphenyl‐2,2′‐diyl)‐1‐(trimethylsilyl)allene, into a series of sterically crowded …