《Chiral Chalcogenyl-Substituted Naphthyl- and Acenaphthyl-Silanes and Their Cations》 was published in Chemistry – A European Journal in 2020. These research results belong to Kuenzler, Sandra; Rathjen, Saskia; Rueger, Katherina; Wuerdemann, Marie S.; Wernke, Marcel; Tholen, Patrik; Girschik, Corinna; Schmidtmann, Marc; Landais, Yannick; Mueller, Thomas. HPLC of Formula: 1194-02-1 The article mentions the following:
Cyclic silylated chalconium borates 13[B(C6F5)4] and 14[B(C6F5)4] with peri-acenaphthyl and peri-naphthyl skeletons were synthesized from unsym. substituted silanes 3, 4, 6, 7, 9 and 10 using the standard Corey protocol (Chalcogen Ch=O, S, Se, Te). The configuration at the chalcogen atom is trigonal pyramidal for Ch=S, Se, Te, leading to the formation of cis- and trans-isomers in the case of phenylmethylsilyl cations. With the bulkier tert-Bu group at silicon, the configuration at the chalcogen atoms is predetermined to give almost exclusively the trans-configurated cyclic silylchalconium ions. The barriers for the inversion of the configuration at the sulfur atoms of sulfonium ions 13 c and 14 a are substantial (72-74 kJ mol-1) as shown by variable temperature NMR spectroscopy. The neighboring group effect of the thiophenyl substituent is sufficiently strong to preserve chiral information at the silicon atom at low temperatures In the experiment, the researchers used many compounds, for example, 4-Fluorobenzonitrile(cas: 1194-02-1HPLC of Formula: 1194-02-1)
4-Fluorobenzonitrile(cas: 1194-02-1) is used as chemical intermediate, solvent for perfumes and pharmaceuticals, stabilizer for chlorinated solvents, HPLC analysis, catalyst and component of transition-metal complex catalysts.HPLC of Formula: 1194-02-1
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts