Survey of Reactions Involving Sulfur Dioxide

Surveyed in this section are known SOg insertion and desulfination reactions. Kinetic and stereochemical results already discussed in Sections III-V, as well as the cycloaddition processes treated in Section V, have been given a cursory mention for the sake of completeness. The insertion reactions involving bonds other than M—C are omitted. Also excluded are all aspects of the chemistry of metal sulhnate complexes except sulfur dioxide insertion and desulfination. Readers interested in alternative methods of synthesis and in the physical and chemical properties of these and related compounds are referred to a recent review 128). 

Insertion of SO2 into the Ti—Me bonds of MeTiCla and MeTiBrs has recently been reported 28a). 

Neither SO2 insertion nor desulfination studies have been reported for these elements. 

Sulfur dioxide insertion has been effected with CpCr(NO)aR [R = Me (61), CHaPh (61, 71, 76), and Ph (71, 76)] in neat SOg the first two compounds also undergo this reaction in hexane solution at room temperature (61). The isolated iS-sulfinate with R = CHaPh does not eliminate SOa upon heating or photolysis (61). 

The ion PhCHaCr(HaO)6 decomposes rapidly when treated with SOa (4). 

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