Nine new tetra Schiff bases (M 2-M 9) were prepared in moderate yields via the condensation of different aromatic amines and bis-Schiff base (M 1) in microwave synthesizer. Also five new azo-Schiff bases (M 16-M 20) were prepared by the condensation of (M 1) with the azo-salicylaldehyde (M 11-M 15) using the same method. The green synthesis by microwave irradiation was chosen as route due to its novelty, cleanliness, efficiency, time and solvent saving properties compared with the conventional methods which lack these advantages; such as time consume and wasting environment polluting organic solvents to achieve the same efficiency in synthesis. The prepared compounds which are believed by us to be competent as photosensitizers in photochemical systems were identified by IR and NMR spectroscopy besides elemental analysis.
The binuclear Schiff base complexes prepared by condensation 2,6-diaminopyridine and salicylaldehyde (LH) by using microwave and adding metal salts to ligand by same ratio. The Schiff base ligand was checked by infrared, electronic spectra and 1 HNMR spectroscopy and prepared complexes characterized by molar conductivity, infrared, electronic spectra and susceptibility measurements. The values of molar conductivities reveal that the complexes are non-electrolytes, from obtained data of electronic spectra and magnetic moment, an octahedral geometry was suggested, coordinated to the metal ions in a manner with N donor sites of imine groups, and oxygen of phenolic OH group.
This work included preparation of substituted organic hydrazone compounds from acid hydrazide(succinic dihydrazide and malonoic dihydrazide) through the reaction with different aromatic aldehyde compounds by using microwave radiation, then identified the products compounds by measuring its physical constants (melting point) and measuring infrared spectra.Confirmation for the prepared compounds structures by using infrared spectro and measuring some physical constants, we sure that the reactions is complete by using new energy radiation under green chemistry which accelerated the reaction in afew seconds and without byproduct.
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