تفاعل #416883

معادلة التفاعل

lithium dimethylamide

Hafnium tetrachloride

lithium dimethylamide

→

hafnium tetrakis(dimethylamide)

المذيبات

diethyl ether

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةthen refluxed 1 hour
2. 2
   أخرىAll volatiles are removed under vacuum at room temperature
3. 3
   استخلاصthe remaining oily solid is extracted twice with 150 ml portions of hexane
4. 4
   أخرىthen transferred to a 50 ml flask
5. 5
   workup.DISTILLATIONSolid hafnium tetrakis(dimethylamide) is distilled from the residue under reduced pressure (boiling point=55° C.-65° C. @ 0.025 mm Hg)
6. 6
   أخرىto give a very low melting, waxy, white solid

الإجراء التجريبي

The lithium dimethylamide, 0.5 mole, in 250 ml of diethyl ether is chilled in an acetone/dry ice bath to -78° C. Hafnium tetrachloride, 35.9 g (0.112 mole), is transferred to a solid addition funnel attached to the 500 ml Schlenk then added over 30 minutes to the magnetically stirred lithium dimethylamide slurry. The mixture is warmed slowly to room temperature then refluxed 1 hour. All volatiles are removed under vacuum at room temperature and the remaining oily solid is extracted twice with 150 ml portions of hexane. The combined extracts are reduced in solvent volume then transferred to a 50 ml flask. Solid hafnium tetrakis(dimethylamide) is distilled from the residue under reduced pressure (boiling point=55° C.-65° C. @ 0.025 mm Hg) to give a very low melting, waxy, white solid.

المصدر