Ni(II) 10-Phosphacorrole, a porphyrinoid containing phosphorus at the meso position, was synthesized from a bis(α,α'-dibromodipyrrin) Ni(II) complex and a phosphine anion via the palladium-catalyzed formation of a C-C and two C-P bonds. The optoelectronic properties of Ni(II) 10-phosphacorrole can be modulated effectively by oxidation or coordination of a metal to the phosphorus center. While Ni(II)
10-Silacorroles Exhibiting Near-Infrared Absorption and Emission
作者:Hiroto Omori、Satoru Hiroto、Hiroshi Shinokubo
DOI:10.1002/chem.201701474
日期:2017.6.12
of a bis(α,α′‐dibromodipyrrin) NiII precursor with dihydrosilanes. These 10‐silacorroles show substantially red‐shifted absorption bands relative to those of normal porphyrins and isocorroles. Notably, the corresponding free base and ZnII 10‐silacorroles exhibit emissions in the NIR region. Theoretical calculations on these 10‐silacorroles revealed the presence of σ*–π* conjugation between the silyl
从双(α,α'-二溴双吡啶)Ni II前驱体与二氢硅烷的Pd催化甲硅烷基化反应中获得10个硅藻油。相对于正常卟啉和异Corroles的吸收,这些10丝氨基酚显示出明显的红移吸收带。值得注意的是,相应的游离碱和Zn II 10-silacorroles在NIR区域显示出排放。对这10个硅羟基的理论计算表明,甲硅烷基和四吡咯π系统之间存在σ* –π *共轭,这大大降低了它们的LUMO能级。
Shaping Antiaromatic π-Systems by Metalation: Synthesis of a Bowl-Shaped Antiaromatic Palladium Norcorrole
作者:Tsubasa Yonezawa、Siham A. Shafie、Satoru Hiroto、Hiroshi Shinokubo
DOI:10.1002/anie.201706134
日期:2017.9.18
The synthesis of a bowl‐shaped antiaromatic molecule was achieved through the deformation of a planar antiaromatic porphyrinic π‐conjugation system by insertion of palladium into the small cavity of a metal‐free norcorrole. The bowl‐to‐bowl inversion dynamics of the antiaromatic Pd‐coordinated norcorrole was determined by variable‐temperature 1H NMR spectroscopy. The metal‐free norcorrole was prepared
碗形抗芳族分子的合成是通过将钯插入无金属正戊醇的小腔中使平面抗芳族卟啉π共轭体系变形而实现的。抗芳香族钯配位的正戊醇的碗到碗的倒置动力学是通过可变温度1 H NMR光谱法确定的。不含金属的正甲酚是通过酸诱导的铜正甲酚的脱金属制备的,这是通过双(二碘联吡啶)铜配合物与噻吩羧酸铜的分子内偶联获得的。
Synthesis and electron-transport properties of a stable antiaromatic Ni<sup>II</sup> norcorrole with the smallest <i>meso</i>-substituent
meso-Dimethylnorcorrole NiII complex exhibited enough stability under ambient conditions despite the distinct antiaromaticity. The small methyl substituents realized a dense and long-range π-stacking in its solid state, which resulted in the superior electron-transporting ability to previously reported NiII norcorroles.
nucleophilic aromaticsubstitution reaction of a nickel bis(α,α′‐dibromodipyrrin) complex with benzaldoxime, followed by an intramolecular annulation of the α‐hydroxy‐substituted intermediate. This unprecedented molecule is a 20π‐electron antiaromatic system, in terms of Hückel's rule of aromaticity, because lone pair electrons of oxygen atoms are incorporated into the 18π‐electron conjugated system of the