ISSN:
1572-8854
Keywords:
Terbium
;
hexaazamacrocyclic complex
;
structure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The title complex was obtained by anion metathesis from [Tb(CH3COO)2(C22H26N6)] (CH3COO)·4H2O and K2CrO4 in aqueous solution. The compound crystallizes in the triclinic space group $$P\bar 1$$ witha=8.384(2),b=10.425(2)c=15.752(2)Å, α=98.82(2), β=93.52(2), γ=97.22(2)°, andZ=2. The structure is ionic and consists of a (+1) complex cation balanced in a 2∶1 ratio by a disordered dichromate ion. The 9-coordinate Tb(III) is linked to the six nitrogen atoms of the macrocyclic ligand L=C22H26N6, as well as to a water molecule and a bidentate chelating chromate situated on opposite sides of the macrocycle. The infrared spectrum shows, in addition to the pattern of the macrocyclic ligand, the absorptions arising from the stretching modes of the bidentate chelating CrO4 2− ligand and of the Cr2O7 2− counterion.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01796062
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