化学
水杨醛
席夫碱
金属
配体(生物化学)
分子
化学位移
无机化学
八面体分子几何学
磁化率
八面体
结晶学
物理化学
晶体结构
有机化学
受体
生物化学
作者
Sherif M. Abd El‐Hamid,Sadeek A. Sadeek,N. S. Abd El-Lattif
摘要
Coordination compounds of Cu (II), Y (III), Zr (IV) and La (III) with the tetradentate Schiff base (H 2 L) obtained through the condensation of p‐phenylenediamine with salicylaldehyde under reflux conditions. The complexes were characterized by elemental analysis, magnetic susceptibility, molar conductance and also, with various spectroscopic techniques such as 1 H NMR, UV–Vis., IR and XRD techniques. Electrolytic nature of complexes was ascertained by molar conductance values. In these four complexes, the ligand chelates act in a tetradentate manner via azomethine nitrogen and oxygen atoms of phenolic groups. Electronic spectroscopic data are in agreement with an octahedral geometrical structure. Thermal degradation analyses in nitrogen gas were used to investigate the number and location of water molecules. The chemical formulae of metal complexes were confirmed by microanalytical data. The activation thermodynamic parameters, such as, E * , ΔH * , ΔS * and ΔG * were calculated from the DTG curves using Coats Redfern (CR) and Horowitz–Metzeger (HM) methods at n = 1 or n ≠ 1. Nematicidal activities indicate that the ligand exhibit greater activity when compared to its complexes. In addition metal complexes displayed good moderate nematicidal activities.
科研通智能强力驱动
Strongly Powered by AbleSci AI