Synthesis and Characterization of Hexapole [7]Helicene, A Circularly Twisted Chiral Nanographene was written by Zhu, Yanpeng;Xia, Zeming;Cai, Zeying;Yuan, Ziyong;Jiang, Nianqiang;Li, Tao;Wang, Yonggen;Guo, Xiaoyu;Li, Zhihao;Ma, Shuang;Zhong, Dingyong;Li, Yang;Wang, Jiaobing. And the article was included in Journal of the American Chemical Society in 2018.Quality Control of 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane This article mentions the following:
The synthesis and characterization of two hexapole [7]helicenes (H7Hs) is reported. Single crystal X-ray diffraction unambiguously confirms the mol. structure. H7H absorbs light, with distinct Cotton effect, from UV to the near-IR (濞?sup>max = 618 nm). Cyclic voltammetry reveals nine reversible redox states, consecutively from -2 to +6. These chiroptical and electronic properties of H7H are inaccessible from helicene’s small homologues. In the experiment, the researchers used many compounds, for example, 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4Quality Control of 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane).
2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4) 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. Ethyl ether is an excellent solvent for extractions and for a wide variety of chemical reactions. It is also used as a volatile starting fluid for diesel engines and gasoline engines in cold weather. Dimethyl ether is used as a spray propellant and refrigerant. Methyl t-butyl ether (MTBE) is a gasoline additive that boosts the octane number and reduces the amount of nitrogen-oxide pollutants in the exhaust. The ethers of ethylene glycol are used as solvents and plasticizers.Quality Control of 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem