Signs of long-range amino proton – ring proton coupling constants in N-ethyl-4-chloro-2-nitroaniline

15 April 1970

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 48 (8) , 1343-1345
https://doi.org/10.1139/v70-221

Abstract

In N-ethyl-4-chloro-2-nitroaniline there exists a measurable indirect spin–spin coupling constant of ±0.39 ± 0.03 Hz between the methylene protons and ring proton 6. The amino proton is coupled to ring protons 5 and 6 and also to the methylene protons. Consequently, although the amino proton resonance is broad due to incompletely relaxed coupling to ¹⁴N, normal multiple resonance experiments show that ⁵J_m^H,NH = 0.67 ± 0.03 Hz and ⁴J_o^H,NH = −0.35 ± 0.03 Hz.

Keywords

COUPLING CONSTANT

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