19028-72-9Relevant articles and documents
Manganese(ii) Schiff-base-mediated reversible deactivation controlled radical polymerization of vinyl acetate
Hashimoto, Patricia K.,Oliveira, Larissa F.,Riga-Rocha, Beatriz A.,MacHado, Antonio E. H.,Santana, Vinicius T.,Nascimento, Otaciro R.,Carvalho-Jr, Valdemiro P.,Goi, Beatriz E.
, p. 10109 - 10117 (2021)
A series of new manganese(ii) complexes were prepared with three bidentate Schiff-base ligands derived by condensation of salicylaldehyde and different cycloalkylamines (cycloalkyl = cyclopentyl, cyclohexyl, and cycloheptyl): [Mn(CyPen-Salicyl)2] (1), [Mn(CyHex-Salicyl)2] (2), and [Mn(CyHep-Salicyl)2] (3). The complexes 1-3 were characterized by FTIR, UV-vis and EPR spectroscopy, elemental analysis, cyclic voltammetry, and computational methods. The manganese(ii) complexes (1-3) were used as controlling agents for the polymerization of vinyl acetate (VAc) initiated by AIBN according to an organometallic-mediated radical polymerization (OMRP) mechanism. The VAc polymerization mediated by the Mn complexes suggests that the control level can be slightly tuned through substitution of the cycloalkyl group on the Schiff-base ligand. Kinetics studies and computational investigations support an RT mechanism and a tailorable Mn complex reactivity mainly altered by steric factors of the Schiff-base ligands. The calculated thermodynamic parameters agree with the mediating ability of these complexes, since the degree of polymerization control decreases with increasing steric hindrance of the Schiff-base ligands, as well as with increasing ΔG values for the formation of dormant species.
Catalyst-free direct ring-opening of cyclic aldimines with aliphatic primary amines to construct o-hydroxy schiff bases
Cao, Zubin,Ding, Qiuyue,Han, Dongyun,Li, Feng,Wang, Jingjing,Wu, Ziyan,Zhai, Hanhui
supporting information, (2022/01/28)
We firstly describe a catalyst-free direct ring-opening of cyclic aldimines with abundant aliphatic primary amines to construct o-hydroxy schiff bases under mild reaction conditions. The corresponding products were generated in good to excellent yields (80–99%). In addition, a gram-scale reaction and further application of the reaction strategy were performed.
Subtle variation of stereo-electronic effects in rhodium(I) carbonyl Schiff base complexes and their iodomethane oxidative addition kinetics
Mokolokolo, Pennie P.,Brink, Alice,Roodt, Andreas,Schutte-Smith, Marietjie
, p. 2740 - 2762 (2020/09/01)
Rhodium(I) carbonyl complexes of the form [RhI(N,O-ScBa)(CO)(PR3)] (R = Ph or Cy), with N,O-ScBaH a mono anionic bidentate Schiff base ligand, 2-(cyclopentyliminomethyl)-5-methylphenol (5-Me-Sal-CyPH), and bearing different phosphine