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Neukirch M, Tragl S, Meyer HJ: Syntheses and structural properties of rare earth carbodiimides. Inorg Chem. 2006 Oct 2;45(20):8188-93.
Crystalline samples of rare earth carbodiimides were synthesized by solid-state metathesis reactions of rare earth trichlorides with lithium cyanamide in sealed silica ampules.
The structure determined for Sm2 (CN2) 3 [C2/m, Z = 2, a = 14.534 (2) A, b = 3.8880 (8) A, c = 5.2691 (9) A, beta = 95.96 (2) degrees , R1 = 0.0267, and wR2 = 0.0667] was assigned for RE2 (CN2) 3 compounds with RE = Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er, and the structure determined for Lu2 (CN2) 3 [R32, Z = 3, a = 6.2732 (8) A, c = 14.681 (2) A, R1 = 0.0208, and wR2 = 0.0526] was assigned for the smallest rare earth ions with RE = Tm, Yb, and Lu by powder X-ray diffraction. |
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