In recent years, new methods to form CC bonds using bimetallic systems have emerged. The use of the PdII/AuI combination (as well as the similar PdII/CuI combination) is being pursued with strong interest following the wave of enormous success of catalysis with gold (the amazing “hardly reactive” element of the old textbooks) developed in the last decade, but other metal combinations look also promising. For the latest developments on this subject, see the Review by P. Espinet, J. A. Casares, and M. H. Pérez-Temprano on page 1864 ff.
In their Communication on page 1890 ff., R. Ziessel et al. describe the use of an inert closo-carborane spacer that has been functionalized, for the first time, at the vertices with two different functional groups of different reactivity. This strategy allows the stepwise post-linking of two different photoactive modules displaying specific spectroscopic features suitable for efficient singlet energy transfer. This chemistry paves the way for the engineering of larger rigid systems.
In their Full Paper on page 1924 ff., J. Zhang et al. report the synthesis of a series of coordination frameworks containing 2D→3D Borromean entanglements; these frameworks show large cavities that can accommodate different kinds of anions with various sizes, shapes, and locations. Gas- and vapor-adsorption studies demonstrate that this system is hydrophilic and size-selective for small, polar molecules and for molecules containing π systems.