Organoantimony carboxylates

Organoantimony carboxylates can be expected to self-assemble. Diphenylanti-mony(III) acetate consists of self-assembled chains, 166, with bridging acetato groups and pseudo-trigonal bipyramidal coordination [423]. 

Surprisingly few organoantimony carboxylates have been structurally characterized. One might expect that further examples of self-assembly in this class of compounds will be identified if systematic structure investigation (as performed for organotin carboxylates) were to be conducted. 

Unlike reactions with organic acid chlorides in the presence of water where hydrolysis proceeds faster than addition to the organic Lewis base, hydrolysis of organoantimony dihalides occurs more slowly than addition to typical Lewis bases as salts of carboxylic acids, allowing for the formation of esters. Thus, reaction of organoantimony dihahdes with salts of monocarboxylic acids yields the diesters (2). [1,2]... 

On the basis of the data presented it would be highly desirable to investigate more organoantimony derivatives of carboxylic, organophosphoric, and other acids, with very good chances of discovering new supramolecular, self-organized structures. 

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