26251-08-1Relevant articles and documents
Copper complexes of 1,4-diazabutadiene ligands: Tuning of metal oxidation state and, application in catalytic C-C and C-N bond formation
Mukherjee, Aparajita,Basu, Semanti,Bhattacharya, Samaresh
, (2019/11/11)
Reaction of 1,4-diazabutadiene (p-RC6H4N = C(H)(H)C = NC6H4R-p; R = OCH3, CH3, H and Cl; abbreviated as L-R) with CuCl2·2H2O in methanol at ambient temperature (25 °C) affords a group of doubly chloro-bridged dicopper complexes of type [{CuI(L-R)Cl}2], designated as 1-R. Similar reaction carried out in acetonitrile furnishes a family of doubly chloro-bridged dicopper complexes of type [{CuII(L-R)Cl2}2], designated as 2-R. Molecular structures of 1-OCH3 and 2-OCH3 have been determined by X-ray crystallography. While copper(I) is having a nearly tetrahedral N2Cl2 coordination sphere in 1-OCH3, the N2Cl3 coordination sphere around copper(II) is distorted square pyramidal in nature in 2-OCH3. Isolated 2-R complexes, on dissolution in methanol, are found to undergo facile reduction of the metal center to generate the corresponding 1-R complexes. The 1-R and 2-R complexes show intense absorptions in the visible and ultraviolet regions. Cyclic voltammetry on the 1-R and 2-R complexes shows both metal-centered and ligand centered redox responses. The 1-R complexes are found to efficiently catalyze C-N cross-coupling reactions between arylboronic acids and aryl amines; while the 2-R complexes display notable catalytic efficiency for nitroaldol reactions.
Ultrasound-assisted synthesis of two new fluorinated metal-organic frameworks (F-MOFs) with the high surface area to improve the catalytic activity
Joharian, Monika,Morsali, Ali
, p. 135 - 146 (2018/11/24)
Micro- and nano-structures of two zinc(II) based fluorinated metal-organic frameworks (F-MOFs) [Zn2(hfipbb)2(4-bpdh)].(DMF)0.5 (TMU-55) and [Zn2(hfipbb)2(4-bpdb)].(DMF)2 (HTMU-55) with micr
A nitroaryloxy aromatic preparation method (by machine translation)
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Paragraph 0109; 0110; 0111; 0112; 0113, (2017/05/23)
The invention discloses a nitroaryloxy aromatic preparation method, comprises the following steps: a, will R1 CHO, R2 CH2 NO2 , Catalyst and a polar organic solvent evenly, 0 °C -40 °C stirring for 6 hours -48 h