in trifluoroacetic acid Kinetics; byproducts: Fe(II), Cu(II), H4PPIX; at concn. of Cu(II)>1E-2 M in 0.1 M trifluoroacetic acid, 0.2percent sodium dodecyl sulfate at 23°C under argon; variation of time between 30 s-22 h; not sepd., detected by UV;