Discrete, Base-Free, Cationic Alkaline-Earth Complexes – Access and Catalytic Activity in the Polymerization of Lactide was written by Sarazin, Yann;Poirier, Valentin;Roisnel, Thierry;Carpentier, Jean-Francois. And the article was included in European Journal of Inorganic Chemistry in 2010.Name: 1,4,7,10-Tetraoxa-13-azacyclopentadecane This article mentions the following:
Well-defined, base free cations of zinc and the alk.-earth metals (Mg, Ca, Sr, Ba) supported by a multi-dentate phenolate ligand and stabilized by perfluorinated weakly coordinating counterions are readily available by simple procedures; the solid-state structures of the magnesium and calcium derivatives were elucidated. Upon treatment with an excess of iPrOH, these complexes generate highly efficient binary catalytic systems for the immortal ring-opening polymerization of L-lactide, yielding poly(L-lactide)s with controlled architectures and mol. features. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Name: 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. At room temperature, ethers are pleasant-smelling colourless liquids. 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.Name: 1,4,7,10-Tetraoxa-13-azacyclopentadecane
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem