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Three nuclei n.m.r. spectroscopy of dimethoate compounds. A large solvent effect on the 31 PSC 1 H vicinal coupling
Author(s) -
Paasivirta Jaakko,
Simanainen Jarmo,
Vesterinen Raili,
Virkki Liisa
Publication year - 1977
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.1270091207
Subject(s) - vicinal , dimethoate , chemistry , solvent , acetone , proton , spectroscopy , resonance (particle physics) , spectral line , amide , nuclear magnetic resonance spectroscopy , crystallography , analytical chemistry (journal) , stereochemistry , organic chemistry , atomic physics , physics , quantum mechanics , pesticide , agronomy , biology , astronomy
Proton, phosphorus and carbon magnetic resonance spectra of dimethoate, dimethoxon, des‐ N ‐methyldimethoate, ω‐hydroxydimethoate, trimethyldithiophosphate and O , O ‐dimethyldithiophosphate in different solvents have been measured. Most of the n.m.r. parameters were characteristic of the structural environment of the corresponding nucleus and solvent‐independent. However, in the amide structures dimethoate, dimethoxon, des‐ N ‐methyldimethoate and ω‐hydroxydimethoate the 31 PSC 1 H vicinal coupling showed an unusually large solvent effect of a 2.3 to 6.5 Hz decrease when CDCI 3 was replaced by acetone‐ d 6 or DMSO‐ d 6 .