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Carbon-13 chemical shifts and 13C15N coupling constants of 3,4-dihydroisoquinoline-15N, its 15N-oxide and their conjugate acids

✍ Scribed by Manfred Christl

Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 189 KB
Volume: 7
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270070712

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✦ Synopsis

Abstract

On protonation of 3,4‐dihydroisoquinoline‐^15^N ^1^J(^13^C—1, ^15^N) is increased by a factor of five and ^1^J(^13^C—3, ^15^N) changes its sign, while on protonation of 3,4‐dihydroisoquinoline‐^15^N‐oxide the coupling constants, including the relatively large ^1^J(^13^C—1, ^15^N), remain practically constant, although significant alterations of the ^13^C chemical shifts take place.

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