Exploring the structural, electronic and optical properties of furan-2-carboxaldehyde and 2-acetylthiophene nicotinoylhydrazone
作者:Agata Trzesowska-Kruszynska
DOI:10.1007/s11224-010-9717-4
日期:2011.6
The crystal and molecular structures of nicotinohydrazide-derived hydrazones, N′-(2-furfurylidene)pyridine-3-carbohydrazide and N′-(1-(2-thienyl)ethylidene)pyridine-3-carbohydrazide, have been determined. The compounds have been also characterized by the solid state IR and UV–Vis spectroscopy. The hydrazones exist in the keto-amine form. According to the results of molecules quantum–mechanical calculations, performed for isolated molecules, this tautomeric form is energetically unfavorable but in the solid and solution states the observed intermolecular interactions support the presence of this form. The furan derivative crystallizes in two polymorphic forms with two molecules in an asymmetric unit regardless of the crystallization method.
Synthetic Approach, Structural Performance and in vitro Antibacterial Activity:
Nitrogen and Oxygen Donor Atoms containing Bidentate Schiff Base Ligand
and its Mononuclear Complexation with Co(II) and Cu(II) Metal Ions
A synthetic approach has been designed and followed for the synthesis of new bidentate Schiff base ligand 2-acetylthiophenenicotinic hydrazone (L) (which possessed nitrogen and oxygen donoratoms) and its Co(II) and Cu(II) mononuclear complexes. All the compounds were examined IR, 1H NMR, mass, EPR, conductivity, elemental analysis, etc. Octahedral geometry has been assigned to all synthesized compounds
设计并遵循了一种合成方法,用于合成新型双齿席夫碱配体2-乙酰基噻吩烟腙(L)(具有氮和氧供体原子)及其Co(II)和Cu(II)单核配合物。所有化合物均经过IR、1H NMR、质量、EPR、电导率、元素分析等检查。根据磁、红外和电子光谱分析,所有合成化合物都被指定为八面体几何形状。分别按照良好扩散和中毒食品方法检查了这些化合物的体外活性,即抗菌(大肠杆菌和铜绿假单胞菌)和抗真菌(黑曲霉、M. phasolina 和 P. glomerata)。在发挥抗真菌活性的过程中,将抗真菌剂以不同浓度掺入熔融琼脂中并充分混合。经过体外活性测试后发现,金属(II)配合物表现出比游离配体显着的活性,但与标准药物相比活性较低。