Dimerization of a Reactive Azaacene Diradical: Synthesis of a Covalent Azaacene Cage [Data]
收藏heiDATA2023-01-01 更新2026-05-11 收录
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https://heidata.uni-heidelberg.de/citation?persistentId=doi:10.11588/data/QO118B
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Two series of regioisomeric dicyanomethylene substituted dithienodiazatetracenes with formal para- or ortho- quinodimethane subunits were synthesized and characterized. Whereas the para-isomers (p-n, diradical index y0=0.01) are stable and isolable, the ortho-isomer (y0=0.98) dimerizes into a covalent azaacene cage. Four elongated σ-CC bonds are formed and the former triisopropylsilyl(TIPS)-ethynylene groups transformed into cumulene-units. The azaacene cage dimer (o-1)2 was characterized by X-ray single crystal structure analysis and temperature-dependent infrared (IR), electron paramagnetic resonance (EPR, solid state), nuclear magnetic resonance (NMR) and ultraviolet-visible (UV-Vis) spectroscopies (solution) indicating reformation of o-1.
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Dresden)
创建时间：
2023-01-01
