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18 de abr. de 2024 · Among them low-valent 3d transition metals appeared as the best candidates, as they are intrinsically more reactive than high-valent ones. However, this reactivity implies that these complexes are often generated in situ, putting further away the aspect of atom economy and low waste.
Hace 6 días · Here, we report a versatile cobalt catalyst for the asymmetric hydrogenation of both α-ketoamides and ketones with high yield and stereoselectivity (Figure 1C). Syn -selective dynamic kinetic resolution (DKR) of cyclic substrates enabled by transition metal catalysts has been successfully and extensively investigated and applied.
6 de may. de 2024 · Complexes of cobalt(II) stabilized by lacunary polyoxometalates (CoPOMs) are highly discussed water oxidation catalysts (WOC). While their activity and stability in the oxygen evolution reaction (OER) have been widely explored, there is still no consensus between those claiming that CoPOMs are active and stable OER catalysts and those suggesting that they rather act as precatalysts, which ...
1 de may. de 2024 · (pyridine)cobalt(Ill)] 6 (Co 4 O 4 (OAc) 4 Py 4, Figure 1) is an ideal model, not only because of its high catalytic activity, but also because the central Co is NMR active (100% natural abundance)
Hace 6 días · Each of the cobalt (II) complexes exhibited effects of temperature and concentration on their absorption spectra that were related to the spin states in various organic solvents. This work provides new insights into the spectroscopic properties resulting from the spin states of cobalt (II) complexes in solution.
8 de may. de 2024 · Abstract. The spin state of the cobalt (II) phenylborate hexa- n- butylsulfide clathrochelate in solutions is studied by paramagnetic NMR spectroscopy. This cage complex is shown to undergo the temperature-induced spin transition in solvents of different nature (acetonitrile, chloroform, dichloromethane, and benzene).
23 de abr. de 2024 · Abstract. Rare-earth metalloligand supported low-valent cobalt complexes were synthesized by utilizing a small-sized heptadentate phosphinomethylamine LsN H 3 and a large-sized arene-anchored hexadentate phosphinomethylamine LlAr H 3 ligand precursors.
