Thioacetic acid metal complexes

Equilibrium data are also available for some Ag1 complexes with alkyl-, alkenyl- and phenyl-thioacetic acids. An important conclusion here is that the strength of the Ag—S bond is mainly determined by its o component.34 In addition, the fact that the cis isomer (1) isomerizes to the trans isomer (2) upon moderate heating suggests that there is no strong metal-to-sulfur -interaction.35 Affinity data for other systems have been compiled by Kuehn and Isied.4... 

The above reactions in this section have been examples of addition alone or addition followed by elimination. Ligand reactions involving nucleophilic substitution are also known and these are of the dealkylation type. Lewis acids such as aluminum chloride or tin(IV) chloride have been used for many years in the selective demethylation of aromatic methyl ethers, where chelation is involved (Scheme 27). Similar cleavage of thioethers, specially using mercury(II) salts, is commonly used to remove thioacetal functions masking ketones (equation 27).104 In some cases, reactions of metal ions with thioether ligands result in isolation of complexes of the dealkylated organic moiety (equations 28 and 29).105-107... 

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