Christian Methfessel, MSc.
Synthesis of a linearly linked Porphyrin-Perylene-Diad as a bolaamphiphilic charge-transfer-lipid
BLA=0? Not so fast! A series of tetraarylcumulenes up to the length of a cumulene has been synthesized and analyzed by X-ray crystallography. The structural data show a distinct reduction in bond-length alternation (BLA) as a function of molecule length, but this trend appears to reach a limit before a cumulenic structure with BLA=0 is achieved.