title: Micellar catalysis of the alkylation of mercuric ions by alkyl cobalt(III) complexes.
abstract: Anionic micelles of sodium lauryl sulfate, NaLS, catalyze the monoalkylation of Hg2+ in dilute acid by alkyl aquobis-(dimethyl glyoximato) cobalt (III), RCo(DH)2(H2O) degrees and the related propane derivatives RCo(DOH) DOpn (H2O)+, where R = Me, Et, n-C5H11. Nonionic micelles of Igepal do not catalyze the reaction. In the absence of micelles RCo(DH)2(H2O) degrees is considerably more reactive than RCo(DOH)DOpn(H2O)+, but this higher reactivity is offset in part by its higher basicity. Anionic micelles markedly increase the basicity of RCo(DOH)DOpn(H2O)+ and slightly increase that of RCo(DH)2(H2O) degrees. For reactions of the unprotonated Co(III) complexes the maximum rate enhancements by micelles of NaLS are: R = Me, 19(131); Et, 58 (65); n-C5H11, 46 (32). (The values in parentheses are for RCo(DOH)DOpn(H2O)+.)
mesh_terms: D000478:Alkylation; D055598:Chemical Phenomena; D002621:Chemistry; D003035:Cobalt; D003102:Colloids; D008628:Mercury; D008823:Micelles; D008968:Molecular Conformation; D013329:Structure-Activity Relationship; D013501:Surface-Active Agents
chemical_list: D003102:Colloids; D008823:Micelles; D013501:Surface-Active Agents; D003035:Cobalt; D008628:Mercury