Muonium Data Base

B44

Formate – d₁ ion

Reaction: DCOO^-+ Mu ® MuD + CO₂^-

Type of reaction: H-atom abstraction

a) Lossack, A.M., Roduner, E. and Bartels, D.M.
Phys. Chem. Chem.Phys., 2001, 3, 2031.

k_M = (3.4 ± 0.3) x 10⁵dm³mol^-1s^-1 pH = 7

log(A/dm³mol^-1s^-1) = 12.16 ± 0.06 E_a = (37.8 ± 0.9) kJ mol^-1 for T ~ 276 K to 367 K

KIE_M/H = k_M/ k_H = 3.4 x 10⁵ / 3.5 x 10⁷ ~ 0.01

KIE_M/D = k_M/ k_D = 3.4 x 10⁵ / 5.2 x 10⁷ ~ 0.007

KIE_H/D = k_H/ k_D = 3.5 x 10⁷ / 5.2 x 10⁷ ~ 0.7

k(H + DCOO^-) = (3.5 ± 0.3) x 10⁷ dm³mol^-1s^-1 pD = 7.0

logA(dm³mol^-1s^-1) = 12.12 ± 0.17 E_a = (26.1 ± 0.9) kJ mol^-1 for T ~ 276 K to 367 K

k(D + DCOO^-) = (5.2 ± 0.5) x 10⁷ dm³mol^-1s^-1 pD = 7.0

logA(dm³mol^-1s^-1) = 11.66 ± 0.20 E_a = (22.5 ± 1.0) kJ mol^-1

all data for H and D from Lossack, A.M. et al., quoted as a)

b) Ng, B.W. Ph.D. Thesis, University of British Columbia, 1983.

k_M = 1.1 x 10⁶m³mol^-1s^-1 pH = 7

E_a = (39 ± 3) kJ mol^-1

KIE = k_M/ k_H = 1.1 x 10⁶ / 3.5 x 10⁷= 0.03

k_H from Lossack, A.M. et al., quoted as a)