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Lithium Melonate, Li~3~[C~6~N~7~(NCN)~3~]·6H~2~O – Synthesis, Crystal Structure and Thermal Properties of a Novel Precursor for Graphitic Carbon Nitrides by Corinna Clauss; Jörg Wagler; Marcus Schwarz; Anke Schwarzer; Edwin Kroke is a Chemistry article available to read on EtoBox.

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## Abstract A new __s__‐heptazine derivative, lithium melonate Li~3~[C~6~N~7~(NCN)~3~] (2), has been prepared from potassium melonate by using an ion exchanger resin. The crystal structure of the hexahydrate Li~3~[C~6~N~7~(NCN)~3~]·6H~2~O (2a) has been determined by X‐ray diffraction analysis (hexagonal, __P__6~3~/__m__, __a__ = __b__ = 12.2263(6), __c__ = 6.8854(6) Å, __V__ = 891.35(10) Å^3^). The results show that this __s__‐heptazine derivative adopts ideal __C__~3__h__~ symmetry, thus comprising 1/6 of the formula moiety in the asymmetric unit. ^13^C NMR spectroscopic data indicate that no melonate‐lithium interaction occurs in solution, whereas lithium is tetrahedrally coordinated by two oxygen and two nitrogen atoms in 2a in the solid. The title compound 2 was further characterised by FTIR, Raman spectroscopy, TG/DTA and elemental analysis. In spite of the high nitrogen content, compound 2 proved to be thermally stable up to ~500 °C. The latter observation is typical for melonates and has been reported for other __s__‐heptazine derivatives as well.

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Author

Corinna Clauss; Jörg Wagler; Marcus Schwarz; Anke Schwarzer; Edwin Kroke

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0372-7874)

Published

2009

Language

EN

Field

Chemistry (Physical Sciences)