Premium
Investigation of substituent effects of chalcones by 13 C n.m.r. spectroscopy
Author(s) -
Soĺǎniová E.,
Toma Š.,
Gronowitz S.
Publication year - 1976
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270080902
Subject(s) - substituent , reactivity (psychology) , chemistry , ring (chemistry) , chemical shift , spectroscopy , carbon fibers , electronic effect , aromaticity , medicinal chemistry , computational chemistry , organic chemistry , photochemistry , molecule , materials science , steric effects , physics , medicine , alternative medicine , pathology , quantum mechanics , composite number , composite material
13 C chemical shifts for 23 para ‐ and meta ‐substituted chalcones of the types 1 and 2 have been determined. The aromatic shieldings are compared with previous results for other aromatic derivatives. Correlations of the 13 C chemical shifts of vinyl carbons and carbonyl carbons as well as ring carbons with Hammett σ parameters, π electron densities and the reactivity parameters of Swain and Lupton provide a consistent picture of electronic effects transmitted through the carbon framework of the compounds studied.