The resonance Raman stretching frequencies (in $\mathrm{cm^{-1}}$) of the bound $\mathrm{O}_{2}$ species in oxyhemerthyrin and oxy-hemoglobin, respectively, are
(a)850 and 1100
(b)750 and 850
(c)850 and 850
(d)1100 and 850
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Oxyhemerythrin binds O₂ as hydroperoxide (ν(O–O) ≈ 844 cm⁻¹); oxyhemoglobin binds it as a superoxide-like unit (≈1105 cm⁻¹).