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 SM ISO690:2012NOVITSKY, Ghenadie, SHOVA, Sergiu, CAŞCAVAL, Alexandru, GULYA, Aurelian. Synthesis, structure and complex formation of N,N′ disalicylidenemethylendiamine (Salmen). In: Revue Roumaine de Chimie, 2002, vol. 47, pp. 1027-1035. ISSN 0035-3930. |
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  Revue Roumaine de Chimie |
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| Volumul 47 / 2002 / ISSN 0035-3930 | ||||||
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| Pag. 1027-1035 | ||||||
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By the reaction between salicylaldehyde, aqueous ammonia solution, and formaldehyde, the new tetradentate ligand N,N′ disalicylidenemethylenediamine - H2L (I) has been synthesized and it has been characterized by X-ray crystallography. Crystal H2L is tetragonal with space group P41212 o=i=9,342(2); c=14,875(3) Å, R=0.049. Molecule I has a non-planar structure with the angles between the planes of the salicylaldimine moieties equal to 118°. This structure is stabilized by the intramolecular H-bond in which the phenol oxygen atom and N atom of azomethine group are involved (O-H = 0.846 Å, O .. N= 1.802 Å, <NHO = 150.2°). The complex formation between H 2L and anhydrous nickel benzoate was studied by means of NMR spectroscopy. For the obtained complex the contact and dipolar shifts were separeted and the mixed σ-π mechanism of spin delocalisation is suggested. |
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| Cuvinte-cheie Engineering controlled terms Amines, Ammonia, crystal structure, Hydrogen bonds, molecular structure, Nuclear Magnetic Resonance, oxygen, Phenols, Positive ions, Solutions, X ray crystallography Engineering uncontrolled terms Azomethine groups, Binding sites, Chelate compounds, Metal ions Engineering main heading Transition metals |
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