Table 1. Wavelengths corresponding to absorption maxima (λmax) of protonated and deprotonated oxime groups, nm

Oxime

λmax, nm

protonated species

oximate ion

Isonitrosin

228

278

Pralidoxime

294

336

Dipyroxime

282

344

Obidoxime

284

352

Methoxime

298

376

Carboxime

306

356

Asoxime

302

354