Phosphorus acids, organotin derivatives

Interest in the organotin derivatives of the acids and thioacids of phosphorus arises from their potential biological action and the wide variety of structures that have been identified by X-ray diffraction. These structures are often particularly complex when the compounds are derived from the partially hydrolyzed mono- or diorganotin compounds, and words such as cubes, drums, crowns, butterflies, clusters, oxygen-capped clusters, and extended clusters have been use to describe them. References to the early work are given in Ref 351, and a recent review is available.352... 

A number of types of organotin derivatives of the phosphorus acids have been prepared, one of the objects being to combine the biological effects of organotin and organophos-phorus compounds. 

Some examples of organotin derivatives of phosphorus acids are given in Table 13-2. 

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