Eigen-Tamm-Wilkins mechanism

Eigen-Tamm-Wilkins mechanism for complex formation.The same mechanism is thought to operate in the formation of the oxalate complex from cis-[Co(en)2(NH3)(OH2)]. Again all three forms of the ligand, ox , oxH", and 0XH2, react with the aquo complex. The outer-sphere association constant for the oxH" anion is 1.5, for the ox anion 5.8 dm mol ° The kinetic results here are compared with those established several years ago for the reaction of [Co(NH3)5(OH2)] with oxalate.The formation of the sulfito complex [Co(NH3)5(S03)] is mentioned in Section 5.7.7. below. 

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