Metalla‐enes and Metalla‐ynes—from Small Molecules to Infinite Polymers

Inorganic polymers with conjugated multiple bonds and metal atoms in the polymer main chain have recently been the subject of a series of publications. Such materials are of interest, inter alia, because of anticipated nonlinear optical properties. Marder et al. and Lewis et al. have synthesized polymeric alkynerhodium complexes such as 1 , while Hopkins et al. have studied the optical properties of the polymeric nitrido complexes 2 .