Journal ArticleDOI
New cobalt complexes incorporating thioether chelation and base-induced homolog-selective transformations thereof
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The reaction of cobalt(II) acetate tetrahydrate with dithiaalkyl-substituted triazene 1-oxides [MeN(O)-NNHC 6 H 4 S] 2 (CH 2 ) x, H 2 MexL affords Co II (MexL) which undergoes facile oxidation by hydrogen peroxide, furnishing [Co III (Mexl)]ClO 4.CH 2 Cl 2.Abstract:
The reaction of cobalt(II) acetate tetrahydrate with dithiaalkyl-substituted triazene 1-oxides [MeN(O)-NNHC 6 H 4 S] 2 (CH 2 ) x , H 2 MexL affords Co II (MexL), which undergoes facile oxidation by hydrogen peroxide, furnishing [Co III (MexL)]ClO 4 .CH 2 Cl 2 . In these complexes the ligands act in a hexadentate manner, and the coordination spheres are of the type CoS 2 N 2 O 2 . When Co(Me2L) + is treated with base, the green complex Co III (Me1)(Me1') is formed through cleavage of the coordinated ligand into two tridentate parts via scission of a C-S bondread more
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Cyclometalation Using d-Block Transition Metals: Fundamental Aspects and Recent Trends
TL;DR: Kinetic investigations have identified the coordination compound 207 as a common intermediate of Calkyl-H and the Caryl-Calkyl bond activation, and suggest steric factors to play a more dominant role than electronic differences in determining the C-C vs C-H selectivity.
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Cobalt(II) and cobalt(III) complexes of thioether-containing hexadentate pyrazine amide ligands: C–S bond cleavage and cyclometallation reaction
TL;DR: Anaerobic reaction of Co(O2CMe)2.4H2O with the thioether-containing acyclic pyrazine amide hexadentate ligand 1,4-bis[o-(pyrazine-2-carboxamidophenyl)]-1,5-dithiopentane (H2) in air affords a cobalt(II) complex [CoII(L2)].MeOH (1b).
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Synthesis, Structure, and Physicochemical Properties of ((Ethylsulfanyl)porphyrazinato)cobalt(II). Metal−Ligand Bonds in Co(OESPz) and in Related Cobalt(II) Tetrapyrroles: Insights from a Density Functional Study
TL;DR: The Co(OESPz) complex as discussed by the authors exhibits intermolecular ferromagnetic interactions with the macrocyclic ligands OMSPz2, Pc2-, Pz2-, and P2- to elucidate the effects of the ligand framework.
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Complexation behaviour of hexadentate ligands possessing N2O4 and N2O2S2 cores: differential reactivity towards Co(II), Ni(II) and Zn(II) salts and structures of the products
TL;DR: In this paper, the results of divalent metal salts of Co, Ni and Zn with 1,2-di(salicylaldimino-o-phenylthio)ethane (H2L1) and H2L2, having N2O2S2 cores, have been explored.
Journal ArticleDOI
The First X-ray Structural Evidence Demonstrating Thiolate Coordination in an Organocobalt B12 Model Complex: Implications for Methionine Synthase
TL;DR: In this paper, the structure of an organocobalt complex containing a unidentate coordinated thiolate was characterized by X-ray crystallography, which demonstrated unambiguously the S-ligation of ethanethiolate to Co, trans to the CH3 ligand.