Reactions of N,N′-ethylenebis(salicylideneiminato)metal(II) complexes with electrons, halide ions and halogen radicals in gaseous plasmas
作者:G.W. Dillow、I.K. Gregor
DOI:10.1016/s0020-1693(00)90414-6
日期:1989.1
Abstract Results of the gas phase reactions between a series of N , N′ -ethylenebis(salicylideneiminato)metal(II) complexes (metal = Co, Ni, Cu, Zn) and electrons, radicals and negative ions contained in plasmas of the halogenated reagent gases NF 3 , CF 2 Cl 2 and CF 3 Br are presented. Resonance electron capture and nucleophilic addition of a halideion to the metalcomplexes compete as the two primary
The complexation of cobalt(II) with chloride, bromide and iodide ions has been studied by spectrophotometry and calorimetry in hexamethyl-phosphoric triamide (HMPA) containing 0.1 mol dm–3(n-C4H9)4NCIO4 as a constant ionic medium at 25 °C. The formation of [CoXn](2–n)(n= 1–4 with X as CI, n= 1–3 with X as Br and n= 1 and 2 with X as I) is proposed, and their formation constants, enthalpies and entropies
在分光光度法和量热法中,采用分光光度法和量热法研究了钴(II)与氯离子,溴离子和碘离子的络合,其中六甲基磷酸三酰胺(HMPA)含有0.1 mol dm –3(nC 4 H 9)4 NCIO 4作为恒定离子介质,在25℃。提出了[CoX n ] (2- n)的形成(n = 1-4,X为CI,n = 1-3,X为Br,n = 1和2,X为I),其形成常数,确定焓和熵。单个钴的电子光谱(Ⅱ))还提取了卤代配合物,表明钴(II)离子在HMPA中是四配位的(不同于显示六配位的其他氧供体溶剂)和四配位的四面体[CoX n(HMPA)4– n ]。(2 – n)+(n = 1–4)逐步形成。尽管与其他非质子供体溶剂相比,HMPA具有显着强的供体性,但与N,N中的吸热性相比,在HMPA中观察到的[CoX] +形成的ΔH ° 1值甚至更小或更负。-二甲基甲酰胺或二甲基亚砜。这表明,尽管在空间上允许[co(HMPA)4
Synthesis, Crystal Structures, and Antibacterial Activity of Copper(II) and Cobalt(III) Complexes Derived from 2-{1-[2-(2-Hydroxyethylamino)ethylimino]ethyl}phenol
作者:Zhi-Xi Hang、Bo Dong、Xing-Wen Wang
DOI:10.1080/15533174.2010.538032
日期:2011.2.24
A new copper(II) complex [Cu(HEP)(N3)] (1), and a new cobalt(III) complex [Co(HEP)(AE)]·Cl·H2O (2), where HEP is 2-1-[2-(2-hydroxyethylamino)ethylimino]ethyl}phenolate, AE is 2-(2-aminoethylamino)ethanol, were prepared and characterized by elemental analysis, IR spectra, and single crystal X-ray diffraction. Complex (1) crystallizes in the monoclinic space group P21/c with unit cell dimensions 9.969(3)
Inequivalent coordination of thiosemicarbazone ligands in cobalt (III) and chromium (III) complexes
作者:Pramila Sonawane、Rajeev Chikate、Avinash Kumbhar、Subhash Padhye、Robert J. Doedens
DOI:10.1016/s0277-5387(00)81652-6
日期:1994.1
Chromium (III) and cobalt (III) complexes derived from 2-ketobutyric acid thiosemicarbazone (H2Kbtsc) have been prepared and characterized. Crystal structure analyses have shown both products to be mixed ligand complexes of the type M(HKbtsc) (Kbtsc) in which the thiosemicarbazone ligand is present in singly deprotonated “thione” and doubly deprotonated “thiol” forms. In each complex, the metal ion is
Utilisation des pièges à radicaux en vue de mettre en évidence des intermédiaires dans la photolyse de complexes contenant une liaison Co<sup>III</sup>—C
作者:Philippe Maillard、Charles Giannotti
DOI:10.1139/v82-205
日期:1982.6.15
idinato cobaloxime, we have shown that the spintrapped hydrogen atom comes from the chelated hydrogen of the dimethylglyoximato anion of the equatorial ligand of CoIIIcomplexes. Using a mixture of two spintraps gives rise to an esr spectrum containing, at the same time, the hydrogen atom and alkylspin adducts.To explain such an efficient spintrapping reaction while the homolysis is in competition