We report the synthesis and structural characterization of two dispiro compounds. These two positional isomers have been designed and synthesized through an efficient method. Because of the rigidity and orthogonality of the spiro bridge, both molecules exhibit a well-defined architecture which consists of two fluorene rings connecting to an indenofluorenyl unit via two sp3 carbon atoms. The structural, electrochemical, optical, and thermal properties of these dispiro isomers are discussed.

中文翻译：

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新的双螺化合物：合成和性质。

我们报告了两种双螺化合物的合成和结构表征。这两个位置异构体已经通过一种有效的方法进行了设计和合成。由于螺桥的刚性和正交性，两个分子均显示出明确定义的结构，该结构由两个芴环组成，该两个芴环通过两个sp3碳原子连接至茚并芴基单元。讨论了这些双螺异构体的结构，电化学，光学和热学性质。