1165940-00-0Relevant articles and documents
Negligible diradical character for the ultralong C-C bond in 1,1,2,2-tetraarylpyracene derivatives at room temperature
Takeda, Takashi,Kawai, Hidetoshi,Herges, Rainer,Mucke, Eva,Sawai, Yoshitaka,Murakoshi, Kei,Fujiwara, Kenshu,Suzuki, Takanori
scheme or table, p. 3693 - 3697 (2009/10/04)
There is evidence that the crystalline-state thermochromic behavior of dispiropyracene acr-1 with an ultralong C-C bond [1.791(3) ? at 413 K, 1.771(3) ? at 93 K] might be due to thermal generation of a bond-dissociated triplet diradical. The C1