Structural Data Showing the Existence of LDI Bonds between the Rings of Dimeric Cofacial Siloxysilicon Phthalocyanines

In
a pair of earlier papers, the existence of long directional
interaction bonds, LDI bonds, was postulated on the basis of data
for cofacial oligomeric siloxysilicon phthalocyanines from this laboratory
and data for other cofacial oligomeric phthalocyanines from the literature.
However, the combined data are not fully suited to the purpose for
which they were used. Here an alternative approach is taken in which
a carefully chosen group of dimeric cofacial siloxysilicon phthalocyanines
is used. Structural data derived from these phthalocyanines is examined
in some detail to determine where it conforms to normal expectations
and where it does not. To a high degree of certainty, consideration
of the results obtained shows that long directional (LDI) bonds exist
in dimeric cofacial siloxysilicon phthalocyanines. The new data also
provide an opportunity for other research on chemical bonds.

在两篇早期研究论文中，研究人员基于本实验室的面对面低聚硅氧基硅酞菁数据以及文献报道的其他共面低聚酞菁数据，提出了长程定向相互作用键（LDI bonds）的存在假说。然而，上述整合得到的数据集并不能完全满足其最初被应用时的研究目标。本文采用了一种替代研究方案，选取了一组经过严谨筛选的二聚体面对面硅氧基硅酞菁作为研究对象。我们对从这类酞菁中获取的结构数据展开了较为细致的考察，以甄别其结构特征哪些符合常规预期，哪些则偏离常规认知。通过极高置信度的结果分析，可以证实二聚体面对面硅氧基硅酞菁中确实存在长程定向相互作用键（LDI bonds）。本研究获得的新数据集也为化学键领域的其他相关研究提供了新的契机。