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35 Cl/ 37 Cl isotope effects on 13 C chemical shifts. Assignment of carbon‐13 NMR lines of polychlorinated hydrocarbons
Author(s) -
Buchner W.,
Scheutzow D.
Publication year - 1975
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.1270071212
Subject(s) - chemical shift , chlorine , isotopes of chlorine , chemistry , isotope , carbon 13 , carbon fibers , chlorine atom , isotopes of carbon , kinetic isotope effect , radiochemistry , analytical chemistry (journal) , deuterium , atomic physics , medicinal chemistry , materials science , organic chemistry , physics , nuclear physics , total organic carbon , composite number , composite material
An isotope effect of about 0·1 Hz at 25 MHz (0·004 ppm) on the 13 C chemical shifts due to directly bonded chlorine has been observed at −50°C for hexachloropropene, hexachlorobutadiene and tetrachlorobutenyne. This effect yields an unambiguous assignment of 13 C NMR lines to specific carbon atoms in these polychlorinated hydrocarbons.