The synthesis and the optoelectronic, magnetic and chiroptical properties of a helically chiral diradicaloid have been reported. Dibenzoindeno[2,1-c]fluorene, the simplest configurationally stable chiral derivative of the family of the indenofluorenes, shows a low HOMO-LUMO gap and a moderate singlet-triplet gap. Enantiomers have been isolated and are configurationally stable. Electronic circular dichroism has been measured and dissymmetry factor calculated. Our experimental findings are supported by DFT calculations.
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Martínez-Pinel et al. (2024) studied this question.
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