Synthesis, NMR structural characterization and molecular modeling of substituted thiosemicarbazones and semicarbazones using DFT calculations to prove the syn/anti isomer formation
作者:T. K. Venkatachalam、Gregory K. Pierens、David C. Reutens
DOI:10.1002/mrc.4041
日期:2014.3
Thiosemicarbazones possessing electron‐donating and electron‐withdrawing groups were prepared, and their spectral characteristics determined. In all cases, the spectra showed that one isomer was formed, allowing further functionalization to molecules of biological interest. We provide NMR data for some of the thiosemicarbazones and semicarbazones. We also provide evidence that for 2‐pyridyl thiosemicarbazone
Synthesis and Crystal Structures of Bis(1-{(E)-2-pyridinylmethylidene}-semicarbazone)iron(II) and -copper(II) Diperchlorate Monohydrates
作者:Ellery R. Garbelini、Manfredo Hörner、Mariana Boneberger Behm、David J. Evans、Fábio S. Nunes
DOI:10.1002/zaac.200800169
日期:2008.8
The pyridine-2-carbaldehyde semicarbazone ligand (HL) reacts with iron(II) and copper(II) perchlorates in boiling ethanol to yield red-violet [FeII(HL)2](ClO4)2·H2O (1) and light-green crystals [CuII(HL)2](ClO4)2·H2O (2). The crystals are triclinic with the metal ions in an octahedral environment, coordinated to two nitrogen and one oxygen-donor atom from HL. Electronic, magnetic and electrochemical
Synthesis, Crystal Structure and Spectroscopic Properties of Bis(1-(<i>E</i>)-2-formylpyridine semicarbazone)nickel(II) Diperchlorate Monohydrate
作者:Ellery R. Garbelini、Manfredo Hörner、Vinícius F. Giglio、Aline H. da Silva、Andersson Barison、Fábio S. Nunes
DOI:10.1002/zaac.200801358
日期:2009.7
Pale-green crystals of the title complex were prepared by reaction of 2-formylpyridine semicarbazone (HCSpy) and nickel(II) perchlorate in boiling ethanol. The crystals are triclinic with the nickel ion in an octahedral arrangement, coordinated by two nitrogen atoms and one oxygen donor atom from each ligand molecule. The effect of coordination on bond lengths and angles was explored by comparison
通过 2-甲酰基吡啶缩氨基脲 (HCSpy) 和高氯酸镍 (II) 在沸腾的乙醇中反应制备标题络合物的淡绿色晶体。晶体与镍离子呈八面体排列的三斜晶体,由来自每个配体分子的两个氮原子和一个氧供体原子配位。通过与同样收集的游离配体 HSCpy 的单晶结构数据进行比较,探索了配位对键长和角度的影响。假设的配位模式得到 1H 和 13C NMR 光谱数据的支持。介绍了电子特性的详细分析,包括半经验量子力学计算。此外,从磁化率和 EPR 测量中获得的数据与低自旋 d8 镍 (II) 配合物一致。
Synthesis, characterization, anticancer and antibacterial evaluation of Schiff base ligands derived from hydrazone and their transition metal complexes
Abstract Copper(II), Nickel(II) and Cobalt(III) complexes with Schiffbaseligandsderivedfromhydrazone, (HL1 = (E)-N′-(pyridin-2-ylmethylene)benzohydrazide, H2L2 = (E)-2-(2-hydroxybenzylidene)hydrazine-1-carboxamide and HL3 = (E)-2-(pyridin-2-ylmethylene)hydrazine-1-carboxamide, were synthesized and spectroscopically characterized by FT-IR, 1H NMR, UV–Vis spectroscopy, X-ray crystallography and
Process for arylating or vinylating or alkynating a nucleophilic compound
申请人:——
公开号:US20030236413A1
公开(公告)日:2003-12-25
The present invention concerns a process for arylating or vinylating or alkynating a nucleophilic compound. More particularly, the invention concerns arylating nitrogen-containing organic derivatives. The arylating or vinylating or alkynating process of the invention consists of reacting a nucleophilic compound with a compound carrying a leaving group and is characterized in that the reaction is carried out in the presence of an effective quantity of a catalyst based on a metallic element M selected from groups (VIII), (Ib) and (IIb) of the periodic table and at least one ligand comprising at least one imine function and at least one supplemental nitrogen atom as the chelating atoms.