Table 1.

UV-vis spectral data of METP complexes and Rd

Compound	Wavelength, nm [ɛ × 10−3 (M−1⋅cm−1)]
Fe(II)-METP*	310  (4.72)	332  (3.31)
Rdred*†	311  (10.8)	333  (6.30)
Fe(III)-METP‡	358  (7.66)	486  (4.42)	565  (2.50)
Rdox*†	380  (10.8)	490  (8.85)	565  (≈4.0)
Co(II)-METP§	353  (3.57)	624  (0.420)	685  (0.617)	735  (0.582)
Co(II)-Rd*¶	350  (4.70)	620  (0.564)	685  (0.616)	748  (0.517)

^*Tris buffer. 

^†Rd from Clostridium pasteurianum (23). 

^‡CH₃OH. 

^§Phosphate buffer. 

^¶Rd from Pseudomonas oleovarans, Tris buffer (30); the ɛ values are reported per metal site.