The author of 《Fluorine-19 NMR spectra and relative thermodynamic stability of mesomeric carbanions obtained from polyfluorophenylmalonic acid derivatives》 were Vlasov, V. M.; Zakharova, O. V.. And the article was published in Zhurnal Organicheskoi Khimii in 1975. Electric Literature of C9H5F5O2 The author mentioned the following in the article:
The 19F NMR spectra of p-RC6F4CH(CO2Et)2 (R = H, F, Br, Me, CF3, CO2Et), p-RC6F4CH(CN)CO2Et (R = H, Cl, Br, F, Me, CF3), p-RC6F4CH(CN)2 (R = H, F, CF3), I (R = CN, CO2Et), and their carbanions (prepared by treatment with NaH) were determined and correlated with the thermodn. stabilities of the carbanions and the acidity of the parent malonate derivativesEthyl 2,3,4,5,6-pentafluorobenzoate(cas: 4522-93-4Electric Literature of C9H5F5O2) was used in this study.
Ethyl 2,3,4,5,6-pentafluorobenzoate(cas: 4522-93-4) belongs to esters.Electric Literature of C9H5F5O2 They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics