期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 6, 页码 1842-1846出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201813335
关键词
boron; cyclic (alkyl)(amino)carbenes; diboration; diradicals; reduction
资金
- Deutsche Forschungsgemeinschaft (DFG)
- DFG Graduate Research Training Group 2112 Molecular Biradicals: Structure, Properties and Reactivity
A new structural class of boron-based diradicals is prepared by Lewis base addition to and reduction of singly cyclic (alkyl)(amino)carbene (CAAC) stabilised diborylalkenes. The diradicals feature a perpendicular olefinic bridge preventing delocalization between the B(CAAC) pi systems, making the coupling between the spin centres very weak. DFT calculations indicate that the compounds are ground-state (open-shell) singlets, with triplet states negligibly higher in energy, thus making the triplet states easily populated thermally.
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