Cobalt complexes in [EMIM]Cl – A catalyst for oxidation of alcohols to carbonyls
作者:Dileep Ramakrishna、Badekai Ramachandra Bhat
DOI:10.1016/j.inoche.2009.11.014
日期:2010.1
Abstract A coordination complex system consisting of Cobalt (II)-Schiff bases with triphenylphosphine were synthesized and characterized. These catalysts were effective in the oxidation of primary and secondary alcohols. The oxidation reactions were carried out in ethyl-methyl-imidazolium ionic liquid in presence of NaOCl. Higher catalytic activity was observed for CoL1.
作者:Biplab Mondal、Soma Chakraborty、Pradip Munshi、Mrinalini G. Walawalkar、Goutam Kumar Lahiri
DOI:10.1039/b000257g
日期:——
terpyridine moiety in the complexes 4–6, whereas those having a CH2 spacer (HL1–3) remain unaltered on co-ordination. The diamagnetic, neutral complexes 1–6 exhibit strong MLCT transitions in the visible region and intraligand transitions in the UV region. A significant shift in MLCT band energy has been observed depending on the ligand field strength of the co-ordinated L. The complexes display a reversible
[Ru II(trpy)(L 1–6)Cl] 1–6(trpy = 2,2′∶6′,2′′-terpyridine; L 1–3 = o - - OC 6 H ^ 3(R)C(R')NCH 2 C ^ 6 ħ 5和L 4-6 = ø - - OC 6 H ^ 3(R)CH(R')N NC 6 H ^ 5 ;其中,R =已经合成了H或p -NO 2且R'= H或CH 3)。免费”配体结合了NH间隔基o -- OC 6 H 3(R)C(R')NNHC 6 H 5(HL 4-6)亚胺 到 偶氮与配合物4-6中的钌三联吡啶部分配位时存在互变异构现象,而具有CH 2间隔基(HL 1-3)的配合物则保持不变。抗磁性的中性配合物1-6在可见光区域表现出很强的MLCT跃迁,而在UV区域表现出配体内跃迁。观察到MLCT波段能量的显着变化,具体取决于配体配合物L的场强。配合物在0.12-0.63 V的
Neurath,G. et al., Chemische Berichte, 1964, vol. 97, p. 1631 - 1638
作者:Neurath,G. et al.
DOI:——
日期:——
Auwers, Justus Liebigs Annalen der Chemie, 1909, vol. 365, p. 315,338
作者:Auwers
DOI:——
日期:——
Auwers; Buerger, Chemische Berichte, 1904, vol. 37, p. 3934