Organic Solutes in Aqueous Solutions

B63

B64

Oxalate monoanion HC2O4-

Stadlbauer, J.M., Barnabas, M.V. and Walker, D.C.

J. Phys. Chem., 1997, 101, 2442.

Reaction: -OOCCOOH + Mu ® -HOOCC(OMu)OH

Type of reaction: addition to C=O of carboxylate group with Mu attached to an O atom

kM(obs) = 6.8 x 107 dm3mol-1s-1  at pH » 3 (90 % HC2O4-)

kM = 7.1 x 107 dm3mol-1s-1  value deduced

kH – unknown at pH » 3

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