The title molecule, which has two diphenylmethylene moieties in a rigid triptycene skeleton, is photochemically generated from the corresponding diazo compound at cryogenic temperature in an ESR cavity, and the ESR spectra is identified with a quintet ground state, with ZFS parameters, |D|/hc= 0.0665 and |E|/hc= 0.0043 cm–1, respectively.
H. Tukada and K. Mutai, J. Chem. Soc., Chem. Commun., 1991, 35 DOI: 10.1039/C39910000035
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