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. 2007 Sep;2(3):449–459.

Table 1.

Observed changes in the chemical shifts of N-ethyl-2,4-dinitrobenzamide and N-ethyl-2,4-dinitrobenzenesulfonamide when complexed with 2,6-dimethylaniline (DMA) and bupivacaine (BPC) in chloroform-d

Donor Observed chemical shift changes (ppm)
Benzamide
Sulfonamide
H3 H5 H6 H3 H5 H6
DMA 0.2496 0.3242 0.3663 0.2252 0.3014 0.2514
BPC 0.3531 0.3686 0.2903 - - -