Transmission of polar effects arcoss the CH=CH link in styrylfuran system

Autor:	Miloslava Dandárová, Anton Beňo, Viera Knoppová, Jaroslav Kováč
Rok vydání:	1981
Předmět:	Transmission (telecommunications) Chemical physics Chemistry Polar General Chemistry Link (geometry)
Zdroj:	Collection of Czechoslovak Chemical Communications. 46:3110-3114
ISSN:	1212-6950 0010-0765
Popis:	Transmission of polar substituent effect through the vinylidene grouping in 5-(4-X-styryl)-2-furaldehydes (X = H, Cl, Br, COOCH3, CN and NO2) was studied by polarographic reduction of the aldehyde group as well as by kinetics of their condensation with malononitrile. The obtained transmission coefficients π' were compared with the corresponding values for systems, containing other links between the benzene and furan nuclei. Thermodynamic parameters of the condensation with malononitrile were determined. The transmission of polar effects is discussed also from the point of view of 1H NMR spectra.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1103e91e872c10254b3328ca1e1decf3 https://doi.org/10.1135/cccc19813110 Zobrazit plný text záznamu