This also means that all four have a high degree of helicality with a MAD below 3.5 as seen in the bottom plot of Figure . Comparing the helicality of the four cycloallenes with 1,3-diMe-allene, we see that the helicality of the cycloallenes approaches the helicality of the 1,3-diMe-allene with increasing ring size as expected. The bending of the cumulated double bonds introduced by the ring has only a minimal effect on the helicality. The introduction of cyclic substituents further enables the fine-tuning of the helical MOs without destroying helicality.