Vafazadeh Rasoul, Alinaghi Moloud, Willis Anthony C, Benvidi Ali
Acta Chim Slov. 2014;61(1):121-5.
Four Cu(II) complexes [CuLX], where X = NO3 (1), Br (2), Cl (3), ClO4 (4) and L = benzoylacetonacetohydrazid tridentate Schiff base, HL, have been synthesized and characterized by elemental analysis, FT-IR, UV-Vis spectroscopy. The structure of compound 1, has been determined by single-crystal X-ray diffraction analysis. The structure of 1 is a mononuclear species, the coordination geometry around the copper(II) ion is four coordinated square planar, L acts as a tridentate ligand which forms one five-membered and one six-membered chelate rings with the Cu(II) metal center, and the fourth position at the Cu ion is occupied by the NO3 anion. The nitrate ions play role in the H bonding network. In fact the amide NH groups act as H donor towards the nitrate oxygen. The formation of the copper complexes in solution was monitored by a UV/Vis titration experiment. The results revealed that the complexes were of the composition (ligand/metal) 1:1 in solution.
已合成了四种铜（II）配合物[CuLX]，其中X = NO₃（1）、Br（2）、Cl（3）、ClO₄（4），L = 苯甲酰丙酮乙酰肼三齿席夫碱HL，并通过元素分析、傅里叶变换红外光谱（FT-IR）、紫外可见光谱对其进行了表征。化合物1的结构已通过单晶X射线衍射分析确定。1的结构是单核物种，铜（II）离子周围的配位几何形状为四配位平面正方形，L作为三齿配体，与铜（II）金属中心形成一个五元螯合环和一个六元螯合环，铜离子的第四个位置被NO₃阴离子占据。硝酸根离子在氢键网络中起作用。实际上，酰胺NH基团作为氢供体与硝酸根氧相互作用。通过紫外可见滴定实验监测了溶液中铜配合物的形成。结果表明，配合物在溶液中的组成是（配体/金属）1:1。
