The synthesis and characterization of new nickel complexes with unusual coordination modes
作者:William Seals、Hadi Arman、Steven Batha、Ghezai T. Musie
DOI:10.1016/j.ica.2016.04.008
日期:2016.7
Abstract Two mononickel complexes, K2[Ni(Hccdp)](CH3OH)·8H2O (1), and [Ni(H2O)6][Ni(H2ccdp)(H2O)2]2·12H2O (2); a dinickel complex, K2[Ni2(ccdp)(acac)(H2O)2]·7H2O (3); and a tetranickel complex, Cs6[Ni4(ccdp)2(μ-η2-η2-CO3)2]·23H2O (4) (ccdp5− = N,N′-Bis[2-carboxybenzomethyl]-N,N′-Bis[carboxymethyl]-1,3-diaminopropan-2-ol; acac− = acetylacetonato) have been synthesized and fully characterized using different
pharmaceutical industry. Here, we report on a nanostructured nickel catalyst that enables the selective hydrogenation of purely aliphatic and functionalized olefins under mild conditions. The earth-abundant metal catalyst allows the selective hydrogenation of sterically protected olefins and further tolerates functional groups such as carbonyls, esters, ethers and nitriles. The characterization of our
官能化烯烃的选择性加氢在化学和制药工业中具有重要意义。在这里,我们报告了一种纳米结构的镍催化剂,该催化剂能够在温和条件下对纯脂肪族和官能化烯烃进行选择性加氢。地球上丰富的金属催化剂允许空间保护的烯烃的选择性氢化,并进一步耐受羰基、酯、醚和腈等官能团。我们催化剂的表征揭示了表面氧化金属镍纳米颗粒的形成,该纳米颗粒由活性炭载体上的 N 掺杂碳层稳定。
Synthesis and Characterization of Transition Metal(II) Schiff Bases Complexes Derived from 2,5-Dihalosalicylaldehyde and 4-Methyl-3-thiosemicarbazide
作者:Jai Devi、Manju Yadav、Som Sharma
DOI:10.14233/ajchem.2018.21438
日期:——
The metal complexes of cobalt(II), nickel(II) copper(II) and zinc(II) with Schiff bases [HL1-2] derived from 2,5-dichlorosalicylaldehyde/2,5-dibromosalicylaldehyde and 4-methyl-3-thiosemicarbazide were synthesized. The structure of all the compounds have been evaluated on the basis of elemental analysis, molar conductance measurements and spectroscopic studies like FT-IR, UV-visible, NMR, ESR and mass. The Schiff base ligands existed as NOS donor coordinating to metal ion through azomethine nitrogen, sulphur of thiosemicarbazide and oxygen of deprotonated phenolic group forming complexes of the type [M(L1-2)2] in 1:2 molar ratio. The spectroscopic data and physical measurement techniques suggested octahedral geometry around metal centres.
Radical-Trapping Antioxidant Activity of Copper and Nickel Bis(Thiosemicarbazone) Complexes Underlies Their Potency as Inhibitors of Ferroptotic Cell Death
作者:Omkar Zilka、Jia-Fei Poon、Derek A. Pratt
DOI:10.1021/jacs.1c08254
日期:2021.11.17
inhibitor of (phospho)lipid peroxidation. In THF autoxidations, CuATSM reacts with THF-derived peroxyl radicals with kinh = 2.2 × 106 M–1 s–1─roughly 10-fold greater than α-tocopherol (α-TOH), Nature’s best RTA. Mechanistic studies reveal no H/D kinetic isotope effects and a lack of rate-suppressing effects from H-bonding interactions, implying a different mechanism from α-TOH and other canonical RTAs, which
在此我们证明了铜 (II)-二乙酰-双 ( N 4 -甲基氨基硫脲) (CuATSM) 是治疗 ALS 和帕金森病的临床候选药物,是一种高效的自由基捕获抗氧化剂 (RTA) 和 (phospho) 的抑制剂脂质过氧化。在 THF 自动氧化中,CuATSM 与 THF 衍生的过氧自由基反应,k inh = 2.2 × 10 6 M –1 s –1─大约是自然界最好的 RTA α-生育酚 (α-TOH) 的 10 倍。机理研究表明,没有 H/D 动力学同位素效应,并且缺乏 H 键相互作用的速率抑制效应,这意味着与 α-TOH 和其他典型 RTA 的机制不同,后者通过 H 原子转移 (HAT) 反应。对于相应的 Ni 2+络合物和 Cu 2+和 Ni 2+的络合物,观察到类似的反应性与其他双(氨基硫脲)配体。计算证实了限速 HAT 不能解释观察到的 RTA 活性的实验发现,而是表明可逆地向双(氨
Synthesis, Structural, Biological Evaluation, Molecular Docking and DFT Studies of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) Complexes bearing Heterocyclic Thiosemicarbazone ligand
A new ligand, 2‐aminonicotinaldehyde N‐methyl thiosemicarbazone (ANMTSC) and its metal complexes [Co(II) (1); Ni(II) (2); Cu(II) (3); Zn(II) (4); Cd(II) (5) or Hg(II) (6)] were synthesized. The compounds were characterized by analytical methods and various spectroscopic (infrared, magnetic, thermal, 1H, 13C NMR, electronic and ESR) tools. The structure of ANMTSC ligand was confirmed by single crystal