Mononuclear copper(ii) Schiff base complexes as effective models for phenoxazinone synthase

Abstract

A sequence of structurally related mononuclear copper(II) complexes of the type [Cu(L)(SCN)] 1-3 and [Cu(L3)(N3)] 4 containing tridentate Schiff base (N2O) ligands (L1(H)-L3(H)), such as (E)-2-(((2-(benzylamino)ethyl)imino)methyl)phenol (L1(H)), (E)-2-(((2-(benzylamino)ethyl)imino)methyl)-4-methylphenol (L2(H)), and...

Deciphering the Mechanism of MRSA Targeting Copper(II) Complexes of NN2 Pincer-Type Ligands

“…All the complexes exhibited two peaks, a highly intense peak around 355 nm, and a low-intensity peak in the range of 631–655 nm (Figure ). The high-energy transition is assigned to the charge transfer (LMCT) from quinoline amidate nitrogen to Cu­(II) center, whereas the low-energy bands were attributed from d–d transitions, specifically 2 B 1g → 2 E g for a square planar Cu­(II) complexes . The order of d–d transition wavelengths was concordant with the electron-releasing ability as morpholine ( 1 ) < di- n -propyl ( 2 ) ≤ di- n -butyl ( 3 ).…”

Insight into the conformational selectivity of cobalt(iii) complexes with a tetradentate salen-type Schiff base ligand and their biorelevant catalysis: a combined experimental and theoretical study

“…In general, the catalytic efficiency is explained in terms of vacant site/s or labile group/s present in the coordination sphere of the metal centre as they facilitate the complex–substrate adduct formation. 53–59 In the present systems, the geometry of mononuclear cobalt complexes is common, with the only difference in the ligand environment at axial sites. As both substrate oxidation processes are expected to follow very similar mechanistic pathways, the details of the same have been examined for OAPH substrate oxidation.…”