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Original Articles

Structure Cristalline Et Caracterisation D’un Nouveau Pyrazolotriazine Phosphonaté Non Centrosymetrique

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Pages 1768-1774 | Received 14 May 2013, Accepted 06 Mar 2014, Published online: 31 Oct 2014
 

GRAPHICAL ABSTRACT

Abstract

Résumé Préparation chimique, études spectroscopiques et cristallographique sont données pour un nouveau non-centrosymetrique pyrazolotriazine phosphonaté (C23H26N5PO3). Ce composé cristallise dans le groupe d’espace orthorhombique Pbc21. L’étude structurale montre que l’unité asymétrique contient deux molécules C23H26N5PO3 cristallographiquement indépendantes. Chaque molécule est constituée d’un cycle triazine et d’un cycle pyrazole partageant une liaison C-N; ces derniers sont liés à un phényl et à un benzyl sur lequel est greffé un diéthylphosphonyle. Des liaisons hydrogène de type N-H…N et N-H…O assurent la cohésion de l’édifice. Les résultats de la spectroscopie RMN du 31P, du 13C et du 1H sont en accord avec l’étude structurale par diffraction des RX.

Mots clés Triazine, pyrazole, diéthylphosphonyle, diffraction des rayons X, RMN

Abstract

Chemical preparation, crystal, and spectroscopic investigations are given for a new noncentrosymmetric pyrazolotriazine phosphonate (C23H26N5PO3). This compound crystallizes in the orthorombic space group Pbc21. X-rays diffraction shows that there are two crystallographic independent molecules. Each molecule consists of a triazine ring and a pyrazole ring sharing a C–N bond, these are linked to a phenyl and a benzyl which is grafted on a diethylphosphonyle. N‒H….N and N‒H…O hydrogen bonds ensure the framework cohesion. The 31P, du 13C, and 1H NMR spectroscopic data are in good agreement with the X-ray structure results.

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