Complex formation of copper(ii), nickel(ii) and zinc(ii) with ethylophosphonoacetohydroxamic acid: solution speciation, synthesis and structural characterization

Abstract

We present herein the thermodynamic and X-ray characterisation of a novel ethyl phosphonohydroxamic acid-based Cu(ii) metallacrown, predominating in solution in a broad pH range.

Near-Infrared Lanthanide-Based Emission from Fused Bis[Ln(III)/Zn(II) 14-metallacrown-5] Coordination Compounds

“…There are other examples of MCs formed with Zn 2+ , including [12-MC-4]­s, [15-MC-5]­s, and a bis­[12-MC-4]­[24-MC-8] “encapsulated sandwich” compounds. ,− The structure reported here stands out among these Zn 2+ MCs because compounds with [14-MC-5] motif are rare, and the Ln-1 series is only the second example reported. The first example of a [14-MC-5] was composed of Mn 3+ and salicylhydroximate ligands that encapsulate a single Ln 3+ in their cavity, plus another Ln 3+ as a part of the MC ring . Even though both aforementioned compounds are [14-MC-5]­s, there are significant differences in their structural compositions (Figure ).…”

Synthesis, Biological Activity and Applications of 1,2,5-Oxadiazol: A Brief Review

“…In 2018, the compound poly[(3-4-amino-1,2,5oxadiazole-3-hydroxamate) thallium(I)] 47 was obtained according to the procedure reported by Neel and co-workers (Scheme 6) [38]. The reaction of the introduction of a hydroxamic group of 45 at the 1,2,5-oxadiazole ring 46 allowed the synthesis of various polynuclear complexes [44].…”

Crystal structure of poly[(μ3-4-amino-1,2,5-oxadiazole-3-hydroxamato)thallium(I)]

“…In this regard, we have adapted the synthetic procedure for 1,2,5oxadiazole with amino-and hydroxamate groups in the 4-and 3-position of the 1,2,5-oxadiazole ring, respectively, and report here the thallium(I) salt of this compound, 1, Tl(C 3 H 3 N 4 O 3 ). The introduction of a hydroxamic group at the 1,2,5-oxadiazole ring allows the consideration of potentially interesting ligand systems for the synthesis of various polynuclear complexes (Pavlishchuk et al, 2018;Lutter et al, 2018;Ostrowska et al, 2019;Gumienna-Kontecka et al, 2007).…”