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1 H NMR spectra of E and Z pyridine‐2‐carbaldehyde 2′‐pyridylhydrazone and related compounds
Author(s) -
Bell C. F.,
Mortimore G. R.
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.1270071011
Subject(s) - pyridine , chemistry , carbon tetrachloride , benzene , solvent , proton nmr , isomerization , nuclear magnetic resonance , medicinal chemistry , organic chemistry , catalysis , physics
Proton magnetic resonance spectra at 100 MHz are reported for the E ‐ and Z ‐isomers of pyridine‐2‐carbaldehyd 2′‐ pyridylhydrazone in carbon tetrachloride, d 6 ‐dimethylsulphoxide and d 6 ‐benzene solutions, and for various monomethylated derivatives in d 6 ‐dimethylsulphoxide. The spectral parameters obtained by analysis with the help of LAOCOON 3 are discussed in terms of solvent effects and the chemical shift changes consequent upon isomerisation are evaluated. Some conclusions are reached concerning the preferred conformations of the E ‐ and Z ‐isomers of pyridine‐2‐carbaldehyde 2′‐pyridylhydrazone.