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获得的面对面低聚硅氧基硅酞菁（siloxysilicon phthalocyanines）数据，以及文献中报道的其他面对面低聚酞菁数据，提出了长程定向相互作用键（long directional interaction bonds，简称LDI键）的存在假说。然而，这些合并后的数据集并不完全适配其最初被用于的研究目标。本研究采用了一种替代方案：选取一组经过精心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进行了较为细致的分析，以明确其在哪些方面符合常规预期，又在哪些方面存在偏离。基于高度可靠的分析结果，可以确定二聚体面对面硅氧基硅酞菁中确实存在长程定向（LDI）键。此次获取的新数据也为化学键领域的其他相关研究提供了可行的契机。