in tetrahydrofuran (N2); molar ratio of Dy:I2 2:3; clear THF soln. of triiodide obtained by filtration or decanting;

in water Kinetics; under Ar; H2O added dropwise to DyI2 at 0°C; centrifugation, decantation, solid washed with MeOH, dried under vac.; elem. anal.;

in water evapn. (water bath);

in tetrahydrofuran (N2); molar ratio of Dy:I(CH2)2I 2:3; clear THF soln. of triiodide obtained by filtration or decanting;

in neat (no solvent) byproducts: DyOI; reaction of Dy in tungsten crucible with stoichiometric amounts of I2 in sidearm for 20 d in evacuated, sealed quartz tube; reaction temp.: 680°C in region of Dy; cooling, removing in N2-filled drybox;; detn. by X-ray diffraction; elem. anal.; major phase of DyI2 (94.5 molepercent), minor phases of DyI3 (4.7 molepercent) and DyOI (0.8 molepercent);;

byproducts: NH3, H2O; 290-400°C, 1 h;