ISOLATION AND X-RAY STRUCTURES OF THE HEXAMETHYLPHOSPHORAMIDE (HMPA)-COORDINATED LANTHANIDE(II) DIIODIDE COMPLEXES [SMI(2)(HMPA)(4)] AND [YB(HMPA)(4)(THF)(2)]I-2
Reaction of samarium diiodide (SmI2) with hexamethylphosphoramide (hmpa) in tetrahydrofuran (thf) gave [SmI2(hmpa)(4)] 1 after recrystallization from toluene, while in the case of YbI2, crystals of [Yb(hmpa)(4)(thf)(2)]I-2 2 were obtained from thf; both 1 and 2 have been structurally characterized and;the influence of hmpa on the reactivity of SmI2 is discussed.