1192206-01-1Relevant articles and documents
Macrocyclic tetranuclear copper (I) complex bearing a N-heterocyclic carbene ligand: Synthesis, structure, and catalytic properties
Gu, Shaojin,Huang, Jingjing,Liu, Xin,Liu, Hongtao,Zhou, Yingshan,Xu, Weilin
, p. 168 - 172 (2012)
A rare macrocyclic tetranuclear copper (I) complex ([Cu4(2) 2](PF6)4) of phenanthroline-based NHC ligand has been prepared and characterized by NMR, ESI-MS spectroscopy, and X-ray diffraction analysis. The compl
Fac- Re(CO)3Cl complexes of [2-(4-R-1 H -1,2,3-Triazol-1-yl) methyl]pyridine inverse click ligands: A systematic synthetic, spectroscopic, and computational study
Anderson, Christopher B.,Elliott, Anastasia B. S.,McAdam, C. John,Gordon, Keith C.,Crowley, James D.
, p. 788 - 797 (2013)
A series of electronically tuned fac-Re(CO)3Cl inverse pyridyl-1,2,3-triazole complexes have been synthesized in good to excellent yields (72-95%) by refluxing methanol solutions of [Re(CO)5Cl] and the substituted [2-(4-R-1H-1,2,3-triazol-1-yl)methyl]pyridine ligands (py(CH2)tri-R). The resulting rhenium(I) complexes were characterized by elemental analysis, HR-ESI-MS and IR and 1H and 13C NMR spectroscopy. Additionally, the molecular structures of three of the complexes were confirmed using X-ray crystallography. The electronic properties of this series of fac-[(py(CH2)tri-R)Re(CO)3Cl] complexes were examined using UV-vis, Raman, and emission spectroscopy and cyclic voltammetry techniques. The complexes exhibit intense absorptions in the UV region, which were modeled using time-dependent density functional theory (TD-DFT). The calculations suggest that the lower energy part of the absorption band is MLCT in nature and additional higher energy π-π* transitions are present. The electronic spectra are nearly identical for all except where R = 4-nitrophenyl, suggesting that the 1,2,3-triazolyl unit acts as an electronic insulator. The TD-DFT calculations suggest that the lowest energy MLCT transition is polarized to the pyridine moiety for all complexes except the nitro-substituted one. With R = 4-nitrophenyl the MLCT is directed to an acceptor MO polarized to the triazole-R moiety. This finding is supported by resonance Raman studies that show enhancement of modes associated with the triazole-R group. The complexes are weakly emissive at room temperature with quantum yields -3 and correspondingly short excited-state lifetimes (τ 20 ns). The electrochemistry of the complexes is defined by quasi-reversible Re oxidation and irreversible triazole-based ligand reduction processes. The nitro-substituted complexes show additional nitrobenzene-type reduction features. Consistent with the spectroscopic data, the positions of the oxidation and reduction processes are essentially unaffected by the electronic nature of the 2-(4-R-1H-1,2,3-triazol-1-yl)pyridine substituent.
Pyridinyl-triazole ligand systems for highly efficient CuI-catalyzed azide-alkyne cycloaddition
Chen, Yunfeng,Meng, Xianggao,Wang, Ye,Zheng, Lei
, (2020/10/02)
Pyridinyl-triazole ligand systems (including N2-2-pyridinyl 1,2,3-triazoles and N1/N2-substituted 2-(NH-1,2,3-triazol-4-yl)pyridines) were found to be superior ligands for CuI-catalyzed azide-alkyne cycloaddition (CuAAC) r
Arylation of Click Triazoles with Diaryliodonium Salts
Virant, Miha,Ko?mrlj, Janez
, p. 14030 - 14044 (2019/10/19)
A robust, selective, and highly efficient method for the preparation of 1,3,4-triaryl 1,2,3-triazolium salts has been developed. It features arylation of a click triazole with a diaryliodonium salt in the presence of a copper catalyst under neat condition
O [...] nuclear copper nitrogen heterocyclic carbene compound
-
Paragraph 0103; 0104; 0105, (2017/09/02)
The present invention relates to an o-phenanthroline hydrate bridged multi-core copper nitrogen heterocyclic carbene compound, and mainly solves the problem that in the prior art, a single-core copper carbene compound as a catalyst for 1,3-dipolar cycload
