Table 3.

Mössbauer parameters at 77K for selected compounds and reactive intermediates.

compound	δ (mm/s)	ΔEQ (mm/s)	area (%)
1	1.19	2.99	100
2	1.17	2.92	100
4	1.06	2.99	100
5	1.17 0.48	3.25 0.71	50 50
6	0.46 0.47	0.37 1.17	50 50
9	0.51 0.45	1.82 0.99	50 50
1 *	1.21	2.94	100
1 + O2 *	1.19 0.46	3.02 0.97	54 46
5 + O2-----25 min *	1.22 0.52 0.40 0.57	3.24 0.53 0.82 0.91	32 32 18 18
5 + O2-----24 hours *	0.44 0.49	0.76 1.59	70 30

^*samples loaded in frozen DMF