Synthesis and some stereoselective radical additions of bis[(phenyldimethylsilyl)methyl]tin dihydride

The synthesis of the new bis[(phenyldimethylsilyl)methyl]tin dihydride (6) starting from chloromethyldimethylsilicon chloride is reported. A study on the radical additions of 6 to various mono- and disubstituted alkynes shows that these reactions take place with high and in some cases with complete stereoselectivity. Full H-1-, C-13-, and Sn-119-NMR data of the new organtins are given.