Ioannidis, Marie et al. published their research in Inorganic Chemistry Communications in 2010 | CAS: 66943-05-3

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.COA of Formula: C10H21NO4

Complexation and structural studies of a sulfonamide aza-15-crown-5 derivative was written by Ioannidis, Marie;Gentleman, Alexander S.;Ho, Lam;Lincoln, Stephen F.;Sumby, Christopher J.. And the article was included in Inorganic Chemistry Communications in 2010.COA of Formula: C10H21NO4 This article mentions the following:

An aza-15-crown-5 derivative, N-[4-(phenyldiazo)benzenesulfonyl]-aza-15-crown-5, 1 was synthesized from com. available starting materials in 55% yield. Compound 1, which contains a sulfonamide link between the crown ether macroring and the azobenzene, readily binds alkali metals in buffered ethanol-water (75:25 volume/volume, pH 6.66). Titration data for both sodium and potassium were readily fitted to a 1:1 metal ion/ligand binding model to obtain stability constants (log K) of 4.7 ± 0.4 and 4.8 ± 0.2 dm3 mol-1, resp. The authors also studied the structures of 1 and the sodium perchlorate salt of 1, [Na(1)(H2O)]2(ClO4)2, which were determined by x-ray crystallog. [Na(1)(H2O)]2(ClO4)2 is a dimer in the solid state whereby a sulfonamide oxygen atom from one of the [Na(1)(H2O)] cations provides solvation of the adjacent macroring bound sodium cation. In the crystal structure, binding of a water mol. to the sodium cation is supported by hydrogen bonding to the sulfonamide oxygen, which represents a supramol. lariat ether-like interaction. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3COA of Formula: C10H21NO4).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.COA of Formula: C10H21NO4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem