A Chemical Definition of the Effective Reducing Power of Thulivm(II) Diiodide by Its Reactions with Cyclic Unsaturated Hydrocarbons

摘要

Thulium diiodide reduces cyclic aromatic hydrocarbons that have reduction potentials more positive than-2.0 V versus SCE.Thus,TmI_2 reacts with cyclooctatetraene or acenaphthylene in THF,or with lithium anthracenide in 1,2-dimethoxyethane (DME) to give thulium triiodide and the thulium (III) complexes [(#eta#~8_(-)C_8H_8) TmI(thf)_2] (1),rac-ansa-[(#eta#~5_(-)C_(12)H_8)_2TmI(thf)](2),or [(#eta#~2-C_14H_10)TmI(dme)_2](3),respectively.The molecular structures of 1-3 were determined by singlecrystal X-ray diffraction.