Alkynyl iodonium salts structure

Tributylstannanes have also been used in the synthesis of alkynyl(aryl)iodonium salts, including 1,3-diynyl derivatives373 and the parent member of the family, HC=CIPh+TfO, which was characterized by X-ray structure analysis.374 The bisphenyliodonium triflate reagent 152 [Eq. (4.110)]372 and analogs375 were synthesized in a similar way. Alkynyltrimethylsilanes may also serve as similar useful starting materials.376,377 X-ray characterization of a variety of alkynyl(aryl)iodonium ion has been reported.332... 

Alkynyl(phenyl)iodonium salts have attracted a significant interest as stable and readily available powerful alkynylating reagents. The preparation, structure, and chemistry of alkynyliodonium salts was extensively covered in a recent review [4]. 

Single-crystal X-ray structures of six alkynyliodonium compounds, all containing oxyanions and including four alkynyl(phenyl)iodonium salts, one alkynylbenziodoxolone and one dialkynyliodonium salt, have been reported. Selected structural data for these compounds are given in Table 3. 

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