Re(CO)3 的 1,4-二氨基酞嗪络合物

IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Journal of Organometallic Chemistry Pub Date : 2024-09-14 DOI:10.1016/j.jorganchem.2024.123376
Towhidi Illius Jeaydi, Wei-Yuan Chen, Christopher J. Ziegler
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引用次数: 0

摘要

1,3-二亚氨基异吲哚啉和取代变体与肼反应生成 1,4-二氨基酞嗪。在本文中,我们介绍了 1,4-二氨基酞嗪和两种带有 Re(CO)3 单元的改进型的化学性质。1,4- 二氨基酞嗪配体形成的双金属复合物与未经改性的酞嗪类似。与此相反,源自半血卟啉的螯合配体以中性双齿化合物的形式结合 Re(CO)3;游离基吡唑和吲唑修饰的 1,4-二氨基酞嗪表现出多种可电离质子的同分异构状态。值得注意的是,介桥氮原子的质子化降低了螯合物两半之间的共轭程度,从而产生了一种类似二胺的复合物,由于低能金属到配体电荷转移(MLCT)转变的减弱,这种复合物在可见光谱中缺乏明显的吸收。
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1,4-diaminophthalazine complexes of Re(CO)3

1,3-Diiminoisoindolines and substituted variants react with hydrazine to produce 1,4-diaminophthalazines. In this paper, we present the chemistry of 1,4-diaminophthalazine and two modified versions with the Re(CO)3 unit. The 1,4-diaminophthalazine ligand forms a bimetallic complex similar to that seen with unmodified phthalazine. In contrast, the semihemiporphyrazine-derived chelating ligands bind Re(CO)3 as neutral bidentate compounds; the freebase pyrazole and indazole modified 1,4-diaminophthalazines exhibit multiple tautomerization states with ionizable protons. Notably, protonation of the meso bridging nitrogen atom reduces the degree of conjugation between the two halves of the chelate, resulting in a diimine-like complex that lacks significant absorption in the visible spectrum due to the abrogation of the low energy metal to ligand charge transfer (MLCT) transition.

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来源期刊
Journal of Organometallic Chemistry
Journal of Organometallic Chemistry 化学-无机化学与核化学
CiteScore
4.40
自引率
8.70%
发文量
221
审稿时长
36 days
期刊介绍: The Journal of Organometallic Chemistry targets original papers dealing with theoretical aspects, structural chemistry, synthesis, physical and chemical properties (including reaction mechanisms), and practical applications of organometallic compounds. Organometallic compounds are defined as compounds that contain metal - carbon bonds. The term metal includes all alkali and alkaline earth metals, all transition metals and the lanthanides and actinides in the Periodic Table. Metalloids including the elements in Group 13 and the heavier members of the Groups 14 - 16 are also included. The term chemistry includes syntheses, characterizations and reaction chemistry of all such compounds. Research reports based on use of organometallic complexes in bioorganometallic chemistry, medicine, material sciences, homogeneous catalysis and energy conversion are also welcome. The scope of the journal has been enlarged to encompass important research on organometallic complexes in bioorganometallic chemistry and material sciences, and of heavier main group elements in organometallic chemistry. The journal also publishes review articles, short communications and notes.
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