Rates of Ring Opening of Radical Cation Intermediates Govern Differences in Thermoluminescence between 1‐ and 2‐Naphthyl‐Substituted Methylenecyclopropanes

The front cover artwork is provided by the group of Prof. Dr. Hiroshi Ikeda in Osaka Prefecture University (Japan). The picture represents the difference in reactivity between 1‐ and 2‐naphthyl‐substituted methylenecyclopropanes. The weak bond in the former substance can be broken even by a small samurai resulting in pink fluorescence, whereas the strong bond in the latter cannot be broken even by a big samurai (resulting in green phosphorescence). Read the full text of the Communication at 10.1002/cptc.201900230. “The difference between the major components of the thermoluminescence exhibited by 1‐ and 2‐naphthyl‐substituted methylenecyclopropanes is a consequence of dissimilarities in stereoelectronically governed rates of ring opening of radical cation intermediates…” This and more about the story behind the front cover can be found in the Communication at 10.1002/cptc.201900230.