Fundamental Studies on Creation of Novel d-pi Electron Systems Containing Heavier Main Group Elements and Their Functions

最近对含有pi键间隔的双金属配合物的d-pi电子系统的兴趣增加是由于它们不同寻常的电子、光学和磁性能。这些化合物中所有pi电子系统的系统限制是对第二行元素的限制。含有较重主族元素的pi电子系统的化学性质最近受到了广泛的关注，尽管它们被认为是高活性的。在本研究项目中，我们开发了一种新的体积较大的二茂铁基单元作为d电子单元，用于稳定较重的主族元素的pi键。然后，我们成功地将其应用于含有较重主族元素的新型d-pi电子体系的合成。具有Pn=Pn(Pn=P,Sb,Bi) -间隔的一系列1,2-二（二茂铁基）二烯烯系统地比较了它们的结构参数和物理性质，使我们认识到它们应该是独特的d-pi电子系统。

The elevated intrest that has recently emerged in d-pi electron systems of bimetallic complexes containing a pi-bond spacer is owed to their unusual electronic, optical, and magnetic properties. A systematic limitation for all the pi-electron systems in these compounds is the restriction to 2nd row elements. The chemistry of pi-electron systems containing heavier main group elements has recently received much attention even though they are known to be highly reactive. In this research project, we have developed a new bulky ferrocenyl unit as d-electron unit for the stabilization of such pi-bonds of heavier main group elements. Then, we have successfully applied it toward the synthesis of novel d-pi-electron systems containing heavier main group elements. A series of 1,2-bis(ferrocenyl)dipnictenes with a Pn=Pn(Pn=P,Sb,Bi) pi-spacer. The systematic comparison of their structural parameters and physical properties allowed us to recognize they should be unique d-pi electron systems.