2,2-Dimethyl-2H-dibenzo[cd,k]fluoranthene, the First Kekulé Hydrocarbon with a Triplet Ground State

摘要

The remarkable differences in the spectroscopic properties of 1 and 2 are the result of the different ordering of the lowest singlet and triplet states for the two compounds. In the case of 1, the ground state is of singlet multiplicity; 2 is a ground-state triplet. Compound 2 is the first representative of a fundamen- tally new class of high-spin molecules.