Synthesis and characterization of new vanadium salcylaldoxime based complexes isolated by hydrothermal process

Numéro de la revue: 36
Auteurs:  Sultana Boutamine, Hennia Slaouti , Ilyes Belkhettab & Zakia Hank

Université des Sciences et de la Technologie Houari Boumédiène, USTHB,  Laboratoire d’Electrochimie, Corrosion, Métallurgie et Chimie Minérale, Faculté de Chimie, BP 32 El Alia, Bab Ezzouar 16111, Alger, Algeria.

Soumis le :26/10/2017          Révisé le 27/03/2018:          Accepté le :28/03/2018

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Abstract

In this paper, the results of a systematic study of the reactivity of salicylaldoxime (C₇H₇NO₂)(H₂L¹), with aqueous solutions of  V(IV) using hydrothermal synthesis are reported.

These reactions lead to the formation of gray-blue compounds : (1)   adduct  of the formula Na₄[V₆^IVV₄^VO₂₂H₂(OH)₆(C₇H₆O₂)₂(C₇H₅NO)].6H₂O (A1), (2) another adduct of formula H₆[V₃^IVV₇^VO₂₅(OH)₃ (C₇H₈NO₂) (C₇H₅NO)₂(C₇H₆O₂)].5H₂O  (A2)  and (3) a trimetric coordination complex of the formula    [V₃O₅(C₇H₅NO)₃(C₇H₄NO₂)₃(C₇H₇NO₂)₃]·(H₂O) (C1).

The obtained compounds were characterized by means of elemental analysis, conductometry, UV-Visible, Fourier transform infrared absorption spectroscopy (FTIR), ¹H and ⁵¹V nuclear magnetic resonance (NMR), EPR, magnetic measurements, mass spectroscopy and cyclic voltammetry.

Key words: hydrothermal synthesis, vanadium complexes, salicylaldoxime.