Isolation and characterization of {MnII[MnIII(salicylhydroximate)]4(acetate)2(DMF)6}.cntdot.2DMF: an inorganic analog of M2+(12-crown-4)

Abstract

The binding of monovalent and divalent ions by crown ethers has long been appreciated.1-3 The etheral oxygen atoms are well suited for sequestration of the hard alkaline earths and alkali Recent photoelectron spectroscopic (pes) studies on the dienes

Copper(II) 15-metallacrown-5 lanthanide(III) complexes derived from l-serine and l-threonine hydroxamic acids

“…l-Serine hydroxamic acid (Serha) and l-threonine hydroxamic (Thrha) were synthesized by following previously published procedure [21]. 1 H NMR spectra were run on a Bruker Avance 300, operating at 300 MHz. IR spectra were measured on a FT-IR spectrometer Bruker IFS66, using KBr discs.…”

“…Metallacrowns are inorganic analogues of crown ethers in which heteroatoms and metal ions substitute for the ring carbons [1,2]. Since they were first reported by Pecoraro and co-workers in 1989 [3,4], several different types of metallacrown complexes contaning various metals, ligands and ring sizes have been developed [5].…”

The Effect of Fused 12‐Membered Nickel Metallacrownson DNA and their Antibacterial Activity

“…The synthesis of the nickel metallacrowns has been achieved via the reaction of NiClz6H20 with the deprotonated salicylhydroxamic acid and ketonoximic acid followed by the addition of the sodium salt of the phenoxyalkanoic acid or anti-inflammatory carboxylic acids, in methanol e.g 10 NiCI2 6H20 + 5 Figure 4 shows that compounds 1, 2, 4 and 5 (lanes 1, 2, 4 and 5, respectively), at concentration 1.2 mM affect the electrophoretic mobility of supercoiled and relaxed pDNA, whereas compounds 3, 6 do not show any effect. The effect of compound 1 becomes more profound in the experiment of Figure 5, where increasing concentrations of the compound 1 were used.…”

Synthesis and Structure Analysis of α and β Forms of [12] Metallacrown-6 Nickel(II) Complex: [Ni6(SCH2CH2CH3)12]

“…1,2 One may substitute heteroatoms, such as transition metals and nitrogen atoms, for the methylene carbon atoms of the parent ether complexes to form metallacrowns. There has been considerable interest in metallacrowns chemistry owing to potential applications in chemically modified electrodes, anion-selective separation agents, liquid-crystal precursors, and magnetic materials.…”