Synthesis and Electrochemical Properties of
2-(4-R1-Phenyl)-6-(4-R2-phenyl)-4-phenyl-3,4-dihydro1,2,4,5-tetrazin-1(2H)-yls
摘要:
A new methodology for creating electroactive components for organic batteries, based on the construction of a molecular platform including stable 3,4-dihydro-1,2,4,5-tetrazin-1(2H)-yl radicals was described. A series of 2-(4-R-1-phenyl)-6-(4-R-2-phenyl)-4-phenyl-3,4-dihydro-1,2,4,5-tetrazin-1(2H)-yls with substituents of various nature was obtained. It was shown that the substituents R-1 in the aromatic ring at position 2 of the tetrazinyl fragment influence the value of the oxidation potential in the radical, but do not influence the value of the reduction potentials, while the substituent R-2 of the aromatic ring at position 6 influence the values of the reduction potentials and practically do not influence oxidation potential values. Based on the obtained electrochemical data, a correlation structure-potential value was revealed for the cathodic and anodic process, with the help of which triarylsubstituted 3,4-dihydro-1,2,4,5-tetrazin-1(2H)-yl radicals with high values of the electrochemical gap were obtained.
Microwave mediated solvent free synthesis of formazans catalyzed by simple ionic liquids derived from dialkylammonium salts
作者:Pranab Jyoti Das、Jesmin Begum
DOI:10.1039/c5ra06363a
日期:——
Microwave assisted solvent free one pot synthesis of formazans, catalysed by ionic liquid is reported for the first time.
首次报道了离子液体催化的微波辅助无溶剂一锅法合成甲醛胺。
Nano BF3·SiO2: A green heterogeneous solid acid for synthesis of formazan dyes under solvent-free condition
作者:Abdolhamid Bamoniri、Bi Bi Fatemeh Mirjalili、Naimeh Moshtael-Arani
DOI:10.1016/j.molcata.2014.06.024
日期:2014.11
A solvent-free, efficient and rapid approach for synthesis of formazan dyes was developed by diazotization of aromatic amines with NaNO2, nano silica-supported borontrifluoride (nano BF3·SiO2), then diazo coupling with aldehyde phenylhydrazones by grinding method at room temperature. This study aimed to overcome the limitations and drawbacks of the previous reported methods such as: low temperature
of ten 5-formazanyl copper(II) complexes in toluene solutions have been observed at room temperature and at that of liquidnitrogen. The ESR(g⁄⁄ and A⁄⁄) and bonding(α2) parameters of the copper ion were greatly affected by substituting several groups at the ortho position of 1-phenyl ring of formazan. Based on these results, the complexes are classified into three groups: Group I, in which A⁄⁄\simeq0
已在室温和液氮下观察到十种 5-甲脒基铜 (II) 配合物在甲苯溶液中的电子自旋共振 (ESR) 光谱。通过在甲臜的1-苯环邻位上取代几个基团,铜离子的ESR(g⁄⁄和A⁄⁄)和键合(α2)参数受到很大影响。基于这些结果,复合物被分为三组:第一组,其中 A⁄⁄\simeq0.012–0.013 cm-1 和 α2\simeq0.5;第 II 组,其中 A⁄⁄\simeq0.017 cm-1 和 α2\simeq0.7,以及第 III 组,其中两个铜离子相互作用。很明显,它们与先前研究的三种含铜蛋白质很好地对应。
Cobalt(III) Bis-o-semiquinone Complexes with 1-Aryl-3,5-Diphenylformazan Ligands: Synthesis, Structures, and Magnetic Properties
作者:N. A. Protasenko、A. I. Poddelskii、R. V. Rumyantsev、I. A. Yakushev、V. K. Cherkasov
DOI:10.1134/s1070328421100067
日期:2021.10
in the studied complexes is a weakly distorted octahedron, and the degree of distortion insignificantly changes depending on the substituent. According to the X-ray structure data and results of magnetic and spectral studies, compounds I–V are low-spin complexes of cobalt(III) bound to two radical anion o-semiquinone ligands and one formazan anion. The magnetic behavior of complexes I–V in a temperature
摘要 新的杂配体钴 (III) bis-3,6- di - tert - butyl - o - benzosemiquinone 与 1-( p - X-苯基)-3,5-二苯基甲臜配体 Co(3,6-SQ) 2 L X (Х为氟( I )、氯( II )、溴( III )、碘( IV )、甲基( V ))。化合物Ⅰ、Ⅱ、Ⅳ的分子结构由X射线结构分析确定(CIF文件CCDC编号2060727(Ⅰ)、2052592(Ⅱ)、2060728(Ⅳ)))。所研究配合物中中心钴离子的配位环境为弱畸变八面体,畸变程度随取代基变化不显着。根据 X 射线结构数据以及磁性和光谱研究的结果,化合物I - V是钴 (III) 与两个自由基阴离子邻半醌配体和一个甲瓒阴离子结合的低自旋配合物。配合物I - V在 50-300 K 温度范围内的磁性行为的特点是反铁磁类型的分子内交换相互作用占优势,而在低于 50 K 的范围内,配合物II