Synthesis and diatropicity of a phenanthrene annelated trans-dimethyldihydropyrene: a novel molecule to indicate the high .pi.-bond order of the 9,10 bond of phenanthrene
Synthesis and diatropicity of a phenanthrene annelated trans-dimethyldihydropyrene: a novel molecule to indicate the high .pi.-bond order of the 9,10 bond of phenanthrene