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Nitrogen-Rich Compounds of the Lanthanoids: The 5,5′-Azobis[1H-tetrazol-1-ides] of the Light Rare Earths (Ce, Pr, Nd, Sm, Eu, Gd)

✍ Scribed by Georg Steinhauser; Gerald Giester; Nicolae Leopold; Christoph Wagner; Mario Villa

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
254 KB
Volume
92
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

On the occasion of Carl Auer von Welsbach's 150th birthday in 2008, we investigated the 5,5′‐azobis[1__H__‐tetrazol‐1‐ides] (C~2~N$\rm{ {_{10}^{2-}}}$; (ZT)^2−^) of the light lanthanoids (Ln) cerium, praseodymium, neodymium, samarium, europium, and gadolinium. Their synthesis was performed by crystallization from aqueous solutions of disodium 5,5′‐azobis[1__H__‐tetrazol‐1‐ide] and the respective lanthanoid nitrate. All compounds are isotypic (triclinic space group P‐1) and crystallize according to the general formula [Ln(H~2~O)~7~]~2~(ZT)~3~⋅10 H~2~O. The crystal structures of all compounds were determined. A distinct lanthanoid contraction could be established, clearly observable by the decrease in the bond lengths in the LnNO~7~ polyhedra from the Ce to the Gd compound. Further, and in contrast to the previously published 5,5′‐azobis[1__H__‐tetrazol‐1‐ides] of the heavy yttric earths, the light Ln cations in this study are coordinated not only by H~2~O molecules but also by one (ZT)^2−^ anion. Further characterization was performed by vibrational (IR and Raman) spectroscopy and elemental analysis.

📜 SIMILAR VOLUMES

Nitrogen-Rich Compounds of the Lanthanoi
Nitrogen-Rich Compounds of the Lanthanoids: The 5,5′-Azobis[1H-tetrazol-1-ides] of some Yttric Earths (Tb, Dy, Ho, Er, Tm, Yb, and Lu)
✍ Georg Steinhauser; Gerald Giester; Christoph Wagner; Nicolae Leopold; Johannes H 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 German ⚖ 315 KB

## Abstract A set of N‐rich salts, 3–9, of the heavy lanthanoids (terbium, 3; dysprosium, 4; holmium 5; erbium, 6; thulium, 7; ytterbium, 8; lutetium, 9) based on the energetic 5,5′‐azobis[1__H__‐tetrazole] (H~2~ZT) was synthesized and characterized by elemental analysis, vibrational (IR and __Rama

New Rare Earth Metal Complexes with Nitr
New Rare Earth Metal Complexes with Nitrogen-Rich Ligands: 5,5′-Bitetrazolate and 1,3-Bis(tetrazol-5-yl)triazenate—On the Borderline between Coordination and the Formation of Salt-Like Compounds
✍ Patrick J. Eulgem; Axel Klein; Nicola Maggiarosa; Dieter Naumann; Roland W. H. P 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 412 KB 👁 2 views

## Abstract From the two nitrogen‐rich ligands BT^2−^ (BT=5,5′‐bitetrazole) and BTT^3−^ (BTT=1,3‐bis(1__H__‐tetrazol‐5‐yl)triazene), a series of novel rare earth metal complexes were synthesised. For the BT ligand, a vast number of these complexes could be structurally characterised by single‐cryst