Affiliation:
1. Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt
2. Inorganic Chemistry Department, National Research Center, Dokki, Cairo, Egypt + Department of Chemistry, Faculty of Sciences and Arts, Khulais, King Abdulaziz University, Saudi Arabia
Abstract
A new series of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), Cd(II), Hg(II) ,
VO(II), UO2(II) , Fe(III) and Ru(III) complexes of N'-(2-hydroxy-5-
phenyldiazenyl)benzylideneisonicotinohydrazide(H2L) have been synthesized
and characterized by elemental,1H-NMR, IR, UV-Vis., ESR, magnetic,
thermogravimetric analyses(TG) and conductivity measurements. The spectral
data show that, the ligand behaves as a neutral bidentate, (2), (4), (5),
(6) and (14), monobasic bidentate, (3), (7), (8), (9) and (10), monobasic
tridentate (11) and (16) or dibasic tridentate (12), (13) and (15) bonded to
metal ions via the carbonyl oxygen atom in ketonic or enolic form,
azomethine nitrogen atom and/or deprotonated phenolic hydroxyl oxygen. The
ESR spectrum of solid vanadyl(II), complex (2) shows axially anisotropic
spectrum with eight lines in the low field region and g?>g||,
A||>>A?relationship, which is characteristics of distorted octahedral
structure with dxy ground state. However, copper(II) complexes (4), (5) and
(6) and manganese(II) complex (10) show an isotropic type while the
copper(II) complexes (3) and (7)show an axial symmetry type with g||>g?>ge
indicating a covalent bond character. The antibacterial and antifungal
activities of the ligand and its metal complexes show mild activity compared
with standard drugs (Tetracycline for bacteria and amphotricene B for
fungi).
Publisher
National Library of Serbia