Charge-Transfer Complexes of PXX (PXX = 6, 12-Dioxaanthanthrene). The Formal Charge and Molecular Geometry
作者:Takehiro Asari、Norihito Kobayashi、Toshio Naito、Tamotsu Inabe
DOI:10.1246/bcsj.74.53
日期:2001.1
Three kinds of charge-transfer (CT) complexes of PXX (PXX = 6, 12-dioxaanthanthrene) have been newly prepared and structurally characterized. In the 1 : 2 CT complex with TNP (TNP = 2,4,6-trinitrophenol), PXX is practically neutral. In the semiconducting partially oxidized salt with I3, the PXX molecules form a trimer and each PXX is formally oxidized by e/3. In the 3 : 2 salt with [Ni(mnt)2]- (mnt = maleonitriledithiolate), the PXX molecules again form a trimer unit and each PXX is formally oxidized by 2e/3. Together with the structural data obtained from the PXX single component crystal, the molecular geometry change by the formal charge on PXX has been examined. A noticeable change has been found in the aromatic ring framework, which is consistent with the distribution of the HOMO coefficients obtained from the extended Hückel calculation.
三种PXX(PXX = 6, 12-二氧杂蒽)电荷转移(CT)复合物被新制备并进行结构表征。在与TNP(TNP = 2,4,6-三硝基苯酚)形成的1:2 CT复合物中,PXX几乎为中性。在与I3形成的半导体部分氧化盐中,PXX分子形成了一个三聚体,每个PXX的正式氧化程度为e/3。在与[Ni(mnt)2]^-(mnt = 马来腈二硫醇盐)形成的3:2盐中,PXX分子再次形成三聚体单位,每个PXX的正式氧化程度为2e/3。结合从PXX单组分晶体获得的结构数据,已经研究了PXX正式电荷引起的分子几何变化。在芳香环框架中发现了显著的变化,这与从扩展Hückel计算得到的HOMO系数分布一致。