Conductometric, spectrophotometric, 1HNMR and quantum chemical studies of the thermodynamics complexation of some transition metal ions with aza-15-crown-5 ligands in acetonitrile solution was written by Payehghadr, Mahmood;Nourifard, Farzaneh;Taghdiri, Mehdi;Behjatmanesh-Ardakani, Reza. And the article was included in Inorganic Chemistry: An Indian Journal in 2012.Quality Control of 1,4,7,10-Tetraoxa-13-azacyclopentadecane This article mentions the following:
In this paper, the complexation reactions between aza-15-crown-5 (A15C5) ligand with Zn2+, Hg2+, Co2+, Ag+ and Cd2+ ions has been studied by conductometric and spectrophotometric methods in acetonitrile solution at various temperatures The formation constants of the resulting 1:1 complexes were calculated from the computer fitting of the molar conductance-mole ratio data at different temperatures At 25鎺矯, the order of stability of the 1:1 complexes of the A15C5 ligand with different cations are as Hg2+> Co2+> Cd2+> Zn2+> Ag+. The enthalpy and entropy changes of the complexation reactions were evaluated from the temperature dependence of formation constants In addition, 1HNMR study of complexes of nitrate salt of Cd+2 in acetonitrile with A15C5 ligand at 25鎺矯 has been also undertaken to compare the results with those obtained by conductivity and UV measurements, which have been found to be in good agreement with each other. Finally, ab initio studies of the level of HF/lanl2dz have been done to investigate the binding energies of the ligand with Ag+ and Hg2+. All theor. data are in line with the exptl. ones. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Quality Control of 1,4,7,10-Tetraoxa-13-azacyclopentadecane).
1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Ethers can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O閳ユ椊 or N閳ユ椊 bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Quality Control of 1,4,7,10-Tetraoxa-13-azacyclopentadecane
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem