A variety of α-halo organoindium reagents were prepared in situ from the reaction of gem- dihalo compounds with indium metal, and their reactions with carbonyl compounds and electron-deficient alkenes were examined. The reactions of simple 1, 1-diiodoalkanes with indium metal gave no defined products but benzal iodide gave stilbene in a moderate yield. α-Halo organoindium reagents drived from α, α-dibromo carbonyl compounds gave ...