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Carbon‐13 NMR spectra of all‐ trans ‐ N ‐retinylidene‐ n ‐butylamine as an analogue of the Schiff's base linkage‐compound in visual pigment
Author(s) -
Tokitô Yasuo,
Inoue Yoshio,
Chûjô Riichirô,
Miyoshi Yasuhiro
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.1270071006
Subject(s) - chemistry , schiff base , stereochemistry , butylamine , protonation , crystallography , photochemistry , organic chemistry , amine gas treating , ion
Carbon‐13 NMR spectra have been obtained for all‐ trans ‐ N ‐retinylidene‐ n ‐butylamine as an analogue of the Schiff's base linkage compound in visual pigment. The chemical shift changes on going from all‐ trans ‐retinal 1 to all‐ trans ‐ N ‐retinylidene‐ n ‐butylamine are observed. These changes indicate the collapse of the bond alternation in conjugated polyene carbons, whereas N‐protonation in all‐ trans ‐ N ‐retinylidene‐ n ‐butylamine does not affect the bond alternation.