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On an Unexpected 2D‐linked Rare Earth 1,2,4‐Triazolate Network: Synthesis, Crystal Structure, Spectroscopic and Thermal Properties of $_{\infty}^{2}\rm [Ho(Tz)_{3}(TzH)_{2}]TzH$
Author(s) -
MüllerBuschbaum Klaus,
Mokaddem Yassin,
Höller Christoph J.
Publication year - 2008
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200800323
Subject(s) - chemistry , lanthanide , molecule , 1,2,4 triazole , holmium , crystallography , raman spectroscopy , crystal structure , infrared spectroscopy , rare earth , single crystal , hydrogen bond , stereochemistry , ion , physics , medicinal chemistry , mineralogy , organic chemistry , laser , optics
The network compound $_{\infty}^{2}\rm [Ho(Tz)_{3}(TzH)_{2}]TzH$ , (Tz − = 1,2,4‐triazolate anion, C 2 H 2 N 3 − , TzH = 1,2,4‐1 H ‐triazole, C 2 H 3 N 3 ), was obtained as pink single crystals by the reaction of the holmium metal with a melt of the amine 1,2,4‐1 H ‐triazole. No additional solvent was used. The compound is an unexpected example of a 2D‐linked network structure as other lanthanides give 3D‐frameworks and MOFs with 1,2,4‐1 H ‐triazole instead. This illustrates that the series of lanthanides yields very different results in attempts to create MOF structures. In $_{\infty}^{2}\rm [Ho(Tz)_{3}(TzH)_{2}]TzH$ the triazolate ligands Tz − function both as μ‐η 1 :η 2 linkers as well as η 1 end on ligands. The latter coordination mode is also found for additional triazole molecules. C.N. is nine for holmium(III). The layers $_{\infty}^{2}\rm [Ho(Tz)_{3}(TzH)_{2}]$ exhibit a system of intra and inter layer hydrogen bonding and to triazole molecules from the melt reaction intercalated in‐between the layers. The product was investigated by X‐ray single crystal analysis, Mid IR, Far IR and Raman spectroscopy, and with DTA/TG regarding its thermal behaviour.