Comproportionation reactions of rare-earth metal trihalides, RX 3 , with the respective R metal in the presence of a transition metal Z, preferably from group 8 through 10, yielded single crystals of 31 {ZR 6 }X 12 R and 22 {ZR 6 }X 10 type compounds, in most cases for the first time, especially with R = Tb, Dy, Ho, and Er. These are compared with literature entries. The crystal structures are discussed for the equal-atom pair {IrEr 6 }I 12 Er and {IrEr 6 }I 10 . In both cases,
Comproportionation reactions of LnX3 (Ln: Sc, Y, La, Gd, Tb, Dy, Ho and X: Cl, Br, I) with the respective rare‐earth metals Ln and transition metals M (M: Ru, Rh, Os, Ir, Fe, Co) at 800—1050 °C leads to the formation of 19 new compounds.
From the reaction mixtures containing Cu(ClO 4) 2 , bidentate ligands L (L = 1,10-phenanthroline, phen, or 2,2'-bipyridine, bpy) and KC(CN) 3 , pairs of [Cu(phen)(C(CN) 3) 2 ] n (1 and 2) and [Cu(bpy)(C(CN) 3) 2 ] n (3 and 4) complexes have been isolated. The composition of 1 and 2 on the one hand as well as 3 and 4 on the other hand is the same, nevertheless the IR spectra in the ν(C≡N) region of individual pairs of complexes were different and thus indicated different bonding modes of C(CN) 3 anions in individual pairs of complexes. This was definitely confirmed by the X-ray analysis which revealed that the complexes 1 and 2 represent a pair of isomers while 3 and 4 are two polymorphic modifications. The complexes 1
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