despite the nondegeneracy of the Hückel MBMOs of the heteroatom derivatives. The syntheses of 3-methylene-1-phenoxyl and 3-methylene-1-naphthoxyl are described. These compounds. biradical valence tautomers of m-quinomethanes, are characterized by EPR spectroscopy and are assigned triplet ground states. Optical resolution of 6-methylenebicyclo[3.1.0]hex-3-ene-one, the precursor of 3-methylene-1-phenoxyl,
定性的理论考虑表明,尽管杂原子衍
生物的HückelMBMOs不具有简并性,但在交替烃中用C原子取代杂原子可能会产生具有三重态基态的非Kekulé。描述了3-亚甲基-1-苯氧基和3-亚甲基-1-
萘氧基的合成。这些化合物。m的双基价互变异构体-
喹啉甲烷通过EPR光谱表征,并被赋予三重态基态。描述了3-亚甲基-1-苯氧基的前体6-亚甲基双环[3.1.0]己-3-烯酮的光学拆分。在间歇加热至室温的条件下,反复辐照20 K活性酮,然后进行重新分离,得到的酮的活性未减,这表明在这种条件下不会发生非手性3-亚甲基-1-苯氧基的再环化。