Coordination compounds containing 2-pyridylselenium ligands: synthesis, structural characterization, and antibacterial evaluation

Abstract

Reactions between 3-amine-2-((pyridin-2-ylmethyl)selanyl)pyridine (L) and MX2 (M = Co, Cu, Zn; X = Cl, Br) result in the formation of the metal(II) molecular complexes 1–5 with the general formula [MX2(L)]....

Oxidorhenium(V) and Rhenium(III) Complexes with Arylselenolato and ‐tellurolato Ligands

“…The structural chemistry of oxidorhenium(V) compounds is well‐established and particularly chelating thiolates are perfectly suitable to stabilize the high‐valent {ReO} 3+ core. But also stable complexes with monodentate thiophenols are known, [43–49] while only a few examples of ReO complexes with arylselenolato and ‐tellurolato ligands are found in the literature [34,35,37–40] . Complexes with monodentate phenolato ligands are hitherto unknown.…”

“…But also stable complexes with monodentate thiophenols are known, [43][44][45][46][47][48][49] while only a few examples of ReO complexes with arylselenolato and -tellurolato ligands are found in the literature. [34,35,[37][38][39][40] Complexes with monodentate phenolato ligands are hitherto unknown. [ReOCl 3 (PPh 3 ) 2 ] proved to be a more favorable starting material than (NBu 4 )[ReOCl 4 ] for the syntheses of such compounds.…”

Bis(2-pyridyl)ditellane as a precursor to CoII, CuI and CuII complex formation: structural characterization and photocatalytic studies

“…The CN stretching vibration band for all compounds (1573–1578 cm −1 ) is shifted compared to that for the free (2-PyTe) 2 ligand band (1550 cm −1 ), which evidences the coordination by the pyridinic nitrogen atom to metal centers (Co II , Cu I and Cu II ). 20,42,43…”

“…The CQN stretching vibration band for all compounds (1573-1578 cm À1 ) is shifted compared to that for the free (2-PyTe) 2 ligand band (1550 cm À1 ), which evidences the coordination by the pyridinic nitrogen atom to metal centers (Co II , Cu I and Cu II ). 20,42,43 The Raman spectroscopy helps to elucidate the neutral coordination behavior of (2-PyTe) 2 showing the N-Co peak at 285 (1) and 284 cm À1 (2), and Co-Cl and Co-Br at 273 and 236 cm À1 , respectively. 44,45 The observation of the Te-Te peaks at 187 (1) and 196 cm À1 (2) means that there is no bond cleavage and formation of an anionic ligand.…”

“…18,19 Metal complexes containing pyridylselenium ligands have shown interesting properties in catalysis and antibacterial activity. [20][21][22] Coordination compounds can also be used in the photocatalytic water splitting reaction for hydrogen production. 23,24 Hydrogen has been shown to be an attractive solar fuel because it does not generate pollutants during the combustion process.…”