Polar Substituent Effects on 19F Chemical Shifts of Aryl and Vinyl Fluorides: A Fluorine-19 Nuclear Magnetic Resonance Study of Some 1,1-Difluoro-2-(4-substituted-bicyclooct-1-yl)ethenes

Article abstract of DOI:10.1021/jo00207a033

An extensive series of 1,1-difluoro-2-(4-substituted-bicyclo<2.2.2>oct-1-yl)ethenes (2) covering a diverse range of substituents ( X = H, NO2, CN, CF3, COOCH3, F, Cl, Br, OCH3, C6H5, C2H, C2Si(CH3)3, CH3, and C(CH3)3) have been synthesized and their 19F N