The title compound, a new inserted type tropone, has been prepared. This planar compound showed an unexpectedly small contribution of the dipolar structure to the ground state, as compared with parent tropone, suggesting a general trend that the net conjugative electronic interaction between a cycloheptatrienylidene group and an electronegative oxygen atom is slight. The slight conjugative interaction was evidenced by a weak electronic spectral E1 band having a C-T character.
我们制备出了标题化合物--一种新的插入型
托品酮。与母体
托品酮相比,这种平面化合物的双极结构对基态的贡献出乎意料地小,这表明
环庚三烯基与电负性氧原子之间的净共轭电子相互作用是微弱的。具有 C-T 特征的微弱电子光谱 E1 波段证明了这种微弱的共轭相互作用。