Iron cacodylate

Zeise had formulated this salt as a compound of ethylene, namely KCl-PtCl2 -H20. Liebig disagreed, considering it rather to contain an ethoxide group (165, 252). Since the compound usually formed as a monohydrate and since the water of hydration could be removed fairly easily, analytical results could be used to justify either viewpoint. Zeise s view prevailed, and was verified by later work. Zeise s last paper (295), by an ironical juxtaposition, appeared right next to Bunsen s first paper on cacodyl (39) ... 

In 10 mM acetate buffer at pH 5.5 and with 4 /tM EDTA present to reduce the catal5dic effects of iron salts, the order of inhibition was determined to be CN- > Ng- > F- > I- > NO3- > Cl- > Br- > OCN" > SCN- > SeCN- > (CIO4-, tetraborate, boric acid, phosphate, sulfate and cacodylate). Clearly the strongest inhibitors are those with metal binding capabilities although this features alone does not readily correlate the series. Indeed, there are complexities which are apparent imder detailed scrutiny and which suggest a very compUcated pattern of inhibitory action by these anions. Curzon and his co-workers and other investigators have carried out detailed studies of the inhibition by azide, cyanide, the halides, and mixtures of various anionic inhibitors. 

A colour reaction for salts of acetic acid is iron(III) chloride solution, which results in a deeply red colour that disappears after acidification. Acetates when heated with arsenic trioxide form cacodyl oxide, which can be detected by its malodorous vapours. 

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