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13C, 15N coupling constants in substituted 1,2,4-triazines-4-15N

✍ Scribed by S. Braun

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
174 KB
Volume
8
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C,^15^N coupling constants in three 1,2,4‐triazine‐4‐^15^N derivatives and in a substituted pyrimidine‐1‐^15^N have been determined and are compared with those in pyridine and quinoline. Of special interest are the data of the 5‐(2‐dimethylamino‐1‐propenyl)‐3,6‐dimethyl‐1,2,4‐triazine‐4‐^15^N, since one observes a characteristic alternation of the absolute value of J(^13^C,^15^N) along the sidechain and a hitherto unobserved very large ^13^C,^15^N coupling constant through four bonds of 3·9 Hz, the origin of which is attributed to the influence of the lone pair orbital on the ^15^N at position 4.

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