Table 1 The redox potential (vs SCE) and oxidation constants of N-aryl hydroxamic acids and N-aryl-N-hydroxyurethanes at pH 8.5 and 25 °C [7, 8].

AHA 1a

370 ± 2

(7.1 ± 0.2) · 10³

AHA 2a

375 ± 6

(9.9 ± 0.3) · 10⁴

AHA 1b

411 ± 2

(2.5 ± 0.1) · 10⁵

AHA 2b

313 ± 2

(1.5 ± 0.1) · 10⁵

AHA 1c

406 ± 1

(8.5 ± 0.6) · 10³

AHA 2c

375 ± 4

(7.1 ± 0.4) · 10⁴

AHA 1d

393 ± 2

(9.2 ± 2.1) · 10⁴

AHA 2d

391 ± 3

(5.0 ± 0.3) · 10⁴

AHA 1e

369 ± 1

(1.5 ± 0.2) · 10⁷

AHA 3

364 ± 2

(8.3 ± 0.6) · 10³

AHA 4

403 ± 1

(9.2 ± 0.6) · 10³

AHA 5

307 ± 2

(8.7 ± 0.4) · 10⁵

AHU 1

345 ± 1

(2.3 ± 0.2) · 10⁴

AHU 2

337 ± 2

(7.5 ± 0.5) · 10⁴

AHU 3

328 ± 2

(3.2 ± 0.2) · 10⁴

AHU 4

351 ± 4

(4.2 ± 0.2) · 10⁴

AHU 5

396 ± 5

(2.5 ± 0.5) · 10⁴