The reaction of primary and secondary alkyl iodides and bromides with Hg (OAc) 2 and HgCl 2 in tetrahydrofuran (THF) affords the THF-incorporated compounds (1), RO (CH 2) 4 X [X= OAc and Cl, respectively], in good yields. When HgBr 2 and aqueous or alcoholic Hg (ClO 4) 2 were used as mercury (II) salts, the yields of 1 (X= Br, OH, and OR′) were low. Similar treatment with HgI 2 gave scarcely any 1. A reaction scheme which involves O- ...