Simple 1-dicyanomethylene-2-chloro-3-aminoindene push-pull chromophores: applications in cation and anion sensing was written by Basurto, Sara;Miguel, Daniel;Moreno, Daniel;Neo, Ana G.;Quesada, Roberto;Torroba, Tomas. And the article was included in Organic & Biomolecular Chemistry in 2010.SDS of cas: 66943-05-3 This article mentions the following:
Push-pull chromophores based on 1-dicyanomethylene-2-chloro-3-aminoindene are readily synthesized. These compounds undergo dramatic color changes in the presence of metal cations as a result of the interaction of the amino substituent with the analytes. One of these compounds is a selective Cu(ii) colorimetric probe in MeCN solution, displaying a dramatic color change upon coordination of the amine group to the metal center. These compounds are also selective cyanide sensors in MeCN solution because of the disruption of the intramol. charge transfer process as the result of the nucleophilic addition of the anion to the indene moiety. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3SDS of cas: 66943-05-3).
1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides. 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.SDS of cas: 66943-05-3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem