Tetramolybdo Complexes of Dialkyl and Diarylarsinates

Recently the synthesis and structure of novel heteropoly complexes has been reported that contain covalently attached groups184). The complexes have the general formula 

The solid is neither an inclusion nor a clathrate compound of sulfur dioxide gas but contains a discrete poly anion consisting of two S03 trigonal pyramids and five 

Mo06 octahedra as shown in Fig. 26. The following reactions depict the formation of the polyanion in solution  

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