Chelated organic ligands nitration

The nitro group has various coordination modes [7,78-81], Synthesis of complexes of metal nitrates is carried out, in the majority of cases, by the method of immediate interaction of these salts with ligands in aqueous-organic (mainly, alcohols) media. Also, the interactions of metal oxides, ligands, and nitric acid are applied, for example (4.18) [82,83], The structure of mixed-ligand complex 848, containing chelate NOT - group, was proved by x-ray diffraction [82,83],... 

From many possible precursors [e.g., metal nitrates or acetates (12), mono-dispersed metal hydrous oxides (549), oxides dissolved in alcohols (12), oxo-alkoxides (550), and alkoxides (12)], metal alkoxides were considered as specially suitable precursors (12, 31, 551) for the preparation of oxide ceramics since the 1950s, mainly due to the ease of their purification. This purification was generally distillation and in some cases crystallization, for example, Zr(0-i-Pr)4(i-Pr-OH), solubility in organic solvents such as the parent alcohols that are miscible with water, and their extremely facile hydrolyzability, which can be modulated effectively by substitution of some of the alkoxide groups with chelating ligands such as (3-diketonates (35, 536). The extraordinary future potential and possibilities of the SG process were reemphasized recently by Sakka (534) and Roy (552) in two review articles. 

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