The butylated hydroxyanisole-nitrite reaction: Effects on N-nitrosodimethylamine formation in model systems.
作者:TSUTAO KURECHI、KIYOMI KIKUGAWA、TETSUTA KATO
DOI:10.1248/cpb.28.1314
日期:——
Butylated hydroxyanisole (BHA) prevented the formation of N-nitrosodimethylamine from dimethylamine and nitrite in a heterogeneous emulsion system. The reaction between BHA and nitrite was shown to yield 8 compounds, including 1-hydroxy-2-t-butyl-4-methoxy-6-nitrobenzene (I) as a major product.
A new method for the mononitration of phenol derivatives by poly(4-vinylpyridinium nitrate) and silica sulfuric acid under mild conditions
作者:Hamid Goudarziafshar
DOI:10.1016/j.cclet.2012.01.032
日期:2012.4
This procedure works efficiently for high selective mono nitration of phenol and substituted phenol to corresponding nitro compounds in moderate to high yield using poly(4-vinylpyridinium nitrate) and silica sulfuric acid in dichloromethane at room temperature. (C) 2012 Hamid Goudarziafshar. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Single-Oxidation of Ni(II) Complexes of Bidentate Fused <i>N</i>-Heterocyclic Carbene–Phenol Conjugates
作者:Romain Kunert、Christian Philouze、Olivier Jarjayes、Tim Storr、Fabrice Thomas
DOI:10.1021/acs.organomet.3c00140
日期:2023.7.10
one metal d-orbital contributes to the singly occupied molecular orbital (SOMO). A very good agreement is found between DFT calculated and experimental vis–NIR and EPR data. Both metalloradical cations could be converted into Ni(III) species by addition of pyridine. The redox isomerism could be monitored by EPR spectroscopy: the [1•Py]+ species exhibits for instance the g-values 2.157, 2.136, and 2
前配体(H 2 L tBu ) +和(H 2 L OMe ) +被合成为氯化物盐。它们分别与咪唑并[1,5- a ]吡啶环和富电子2,4-(二叔丁基)苯酚或2-(叔丁基)-4-甲氧基苯酚缔合。制备了 H 2 L tBu ( 1 ) 和 H 2 L OMe ( 2 )的均配 Ni(II) 配合物并进行了结构表征,显示出四配位镍中心,两个配体分别由一个酚氧和一个卡宾结合。配合物图1和图2在其循环伏安曲线中显示了两个可逆氧化波,分别为E 1/2 1 = 0.19 V和E 1/2 2 = 0.59 V,以及E 1/2 1 = 0.03 V和E 1/2 2 = 0.32分别为V。生成单电子氧化形式并通过光谱进行表征,而2 +可以作为单晶分离。它们都显示出两个显着的近红外谱带,表明 CH 2 Cl 2中的自由基种类。1 +的EPR 参数为 2.097、2.023 和 1.997(g平均值= 2.039)对于2