Chromatographic analysis of electrophilic substitution reactions of cobalt(III) and chromium(III) 2,4-pentanedionates
作者:T.J. Cardwell、T.H. Lorman
DOI:10.1016/s0020-1693(00)81018-x
日期:1984.5
Abstract Bromination of cobalt(III) and chromium(III) 2,4-pentanedionates has been thoroughly investigated by GC and HPLC. GC was found to be unsuitable for analysis of the cobalt complexes and HPLC was recommended for monitoring electrophilic substitutions of metal β-diketonates, especially chelates which are labile or thermally unstable. Thermogravimetric and Differential Thermal Analyses of the
摘要用气相色谱和高效液相色谱法对2,4-戊二酸钴(III)和铬(III)的溴化反应进行了深入研究。发现GC不适合用于分析钴配合物,建议使用HPLC监测金属β-二酮酸盐(尤其是不稳定或热不稳定的螯合物)的亲电取代。部分溴化和完全溴化的螯合物的热重分析和差示热分析已用于解释其GC行为。通过质谱和13 C NMR鉴定产生各种色谱峰的反应组分。
Linkage isomerization resulting from phenylisocyanation of unsubstituted and γ-halogenated β-diketonates
Linkageisomerization in β-diketonates resulting from sterically induced intramolecular rearrangement in metal-ligand bonding have been observed during phenyl isocyanation of β-diketonato and β-ketonimino complexes of chromium(III), cobalt(III), cobalt(II), nickel(II) and copper(II). Steric repulsions operating between γ-CO·NH·Ph and α-C6H5 or between γ-CO·NX·Ph (γ-halogenated substrate) and α-CH3/C6H5
在β-二酮基和铬(III),钴(III),钴(II),镍( II)和铜(II)。位阻斥力γ-CO之间操作·NH·h和α-C 6 H ^ 5或γ-CO之间·NX·博士(γ-卤代基板)和α-CH 3 / C 6 H ^ 5的环的,可能导致重排使金属-配体的键合从MO(二酮氧)变为MO(酰胺氧)。
Inner Complexes. III. Ring Bromination of β-Dicarbonyl Chelates
Samath, S. Abdul; Raman, M.; Ramalingam, S. K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1988, vol. 27, # 1, p. 63 - 65