Table 2. Photoreactivity of Arylazo Sulfones (1a–g) Irradiated in Argon Purged Solutions^a,b.

azosulfone	2a–gc	H+d	MeSO2He (%)
1a	44	76	52
1b	51	86	69
1c	51	69	67
1d	63	31	31
1e	76	72	71
1f	39	21	21
1g	75	42	41

^aConditions: an argon-purged acetonitrile solution of 1a–g (2.5 × 10^–2 M) was irradiated with one 40 W Kessil Lamp with emission centered at 456 nm for 3 h until the total consumption of the arylazo sulfone.

^bThe consumption of 1a–g was determined by HPLC analysis.

^cYields of 2a–g were determined by GC analysis.

^dDetermined by potentiometric titration with a solution of NaOH 0.1 M.

^eDetermined through IC.