Europium, isolation of materials

Europium, isolation of materials containing samarium, ytterbium and, by means of sodium amalgam, 5 32, 33 phosphors containing strontium sulfide or selenide and, 3 21, 22... 

See also Isolation of samarium, europium, and ytterbium materials by means of sodium amalgam, synthesis 10 Sodium monothiophos-phate, synthesis 28 Tripotassium enneachlo-ro ditungstate (III), synthesis 38... 

ISOLATION OF SAMARIUM, EUROPIUM, AND YTTERBIUM MATERIALS BY MEANS OF SODIUM AMALGAM... 

Pentamethylcyclopentadienyl complexes of Sm(II), Eu(II) and Yb(II) have been prepared and characterized after 1980. Red bis(pentamethylcyclopentadienyl) europium(II) complexes with one coordinated THF or one THF and one Et20 are isolated from the reactions of europium trichloride and sodium pentamethylcyclo-pentadienide in refluxing tetrahydrofuran and crystallization from toluene or ether (Tilley et al., 1980). Red diamagnetic bis(pentamethylcyclopentadienyl)ytterbium(II) coordinated with THF or Et20 are formed in the analogous reaction, but using YbCl 2 as the starting material. 

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