Studies on some salicylaldehyde Schiff base derivatives and their complexes with Cr(III), Mn(II), Fe(III), Ni(II) and Cu(II)
作者:S.A. Abdel-Latif、H.B. Hassib、Y.M. Issa
DOI:10.1016/j.saa.2006.09.013
日期:2007.7
synthesized and studied by thermogravimetric analysis. The thermal dehydration and decomposition of these complexes were studied kinetically using the integral method applying the Coats-Redfern equation. It was found that the thermaldecomposition of the complexes follow second order kinetics. The thermodynamic parameters of the decomposition are also reported. The electronic absorption spectra of the
Indium(III) chloride catalyzed in situ generation of enamines and cyclization with imines: a novel route for synthesis of hexahydroxanthene-9-N-arylamines
作者:Marimuthu Anniyappan、D Muralidharan、Paramasivan T Perumal、Jagadese J Vittal
DOI:10.1016/j.tet.2004.02.009
日期:2004.3
A simple, efficient, and novel method has been developed for the synthesis of hexahydroxanthene-9-N-arylamine derivatives through a one-pot reaction of cyclohexanone and morpholine with salicylaldehyde imines in the presence of indium(III) chloride as a catalyst. 1-(4-Morpholino)-cyclohexene enamine prepared in situ from cyclohexanone and morpholine in presence of 20 mol% InCl3 in acetonitrile under
Synthesis, spectral studies of salicylidine-pyridines: Crystal and molecular structure of 2-[(1E)-2-aza-2-(5-methyl(2-pyridyl)ethenyl)]-4-bromobenzen-1-ol
作者:Hakan Dal、Yasemin Süzen、Ertan Şahin
DOI:10.1016/j.saa.2006.08.037
日期:2007.7
equilibria [phenol-imine (O-H...N) and keto-amine (O...H-N) forms] in polar and non-polar solvents. In order to rationalize the stabilization of tautomer in solid state, X-ray structure of 2-[(1E)-2-aza-2-(5-methyl(2-pyridyl)ethenyl)]-4-bromobenzen-1-ol (6) was determined. According to our crystallographic result, it has enol-imine tautomeric form.
REACTION OF COMPOUNDS WITH A H-P BOND WITH SCHIFF-BASES
作者:Jian Rohovec、Pavel Vojtíšek、Ivan Lukeš
DOI:10.1080/10426509908037002
日期:1999.5.1
with a P-H bond to Schiff bases of both simple and macrocyclic compounds proceeds smoothly as a non catalysed thermally initialised reaction in an inert solvent. For macrocyclic systems and bulky phosphorus substituents a stereoselective formation of the trans isomer was confirmed by X ray analysis. The addition is reversible, and the reverse reaction is catalysed by Lewis acids. The trans orientation
摘要 具有 PH 键的化合物与简单和大环化合物的席夫碱的加成作为惰性溶剂中的非催化热初始化反应顺利进行。对于大环系统和庞大的磷取代基,通过 X 射线分析证实了反式异构体的立体选择性形成。加成是可逆的,逆反应由路易斯酸催化。大环上磷取代基的反式取向、分子的立体化学刚性和加成的可逆性限制了以这种方式形成的化合物作为配体的用途。
Synthesis, spectroscopy, electrochemistry, and molecular structure of<i>tetrakis</i>{(E)-2-((pyridin-2-ylimino)methyl)phenolato}(hydroxido)<sub>0.5</sub>(nitrato)<sub>1.5</sub>-tetracopper(II) nitrate hydroxide
irreversible redox processes for the Cu(II)/Cu(I) and Cu(I)/Cu(0) couples in acetonitrile. X-ray molecularstructure determination explores the formation of a cationic tetranuclear copper(II)-complex, in which a deprotonated ligand molecule chelates to one copper ion with the phenolate-O and imino-N atoms. In addition, a phenolate-O atom bridges between two neighboring copper ions and a pyridine-N atom coordinates