[7790-87-6] · CeI3 · Cerium(III) Iodide · (MW 520.83)
(organocerium reagents prepared from cerium triiodide and organolithiums have reduced basicity and possess enhanced nucleophilicity toward the carbonyl group; promotes aldol reaction between a-halo ketones and aldehydes; in combination with LiAlH4 is a selective 1,2-reducing agent)
Alternate Name: cerium triiodide
Physical Data: mp 752 °C.
Solubility: sol water, acetone.
Form Supplied in: bright yellow solid.
Preparative Methods: pure CeI3 is prepared by the reaction of metallic cerium with iodine or mercury(II) iodide at high temperature.1,2 Another method is to dissolve CeO2 in aqueous HI solution, adding 12 moles of NH4I per mole of CeO2, and evaporating the mixture to dryness. The mixture is heated in vacuo at 300-350 °C to leave pure CeI3.3 CeI3 is prepared in situ by the reaction of powdered cerium with iodine in THF.4
Handling, Storage, and Precautions: extremely hygroscopic and turns brown when exposed to air owing to the liberation of iodine. This reagent should be stored under nitrogen and handled in a glove bag.
Organocerium reagents are prepared by the reaction of CeI3 with Cerium triiodide is used for cross-aldol reaction between Tsuneo Imamoto Chiba University, Japan
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Cerium triiodide is used for cross-aldol reaction between Tsuneo Imamoto Chiba University, Japan
Chiba University, Japan