Studies of Mn(II), Co(II), Ni(II) and Cu(II) chelates with 3-phenyl-4-(p-methoxyphenylazo)-5-pyrazolone

被引：26

作者：

Abdel-Latif, SA ^{[1
]}

Hassib, HB

机构：

[1] Helwan Univ, Fac Sci, Dept Chem, Cairo, Egypt

[2] Cairo Univ, Fac Sci, Dept Chem, Giza, Egypt

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2002年 / 68卷 / 03期

关键词：

azo dyes; chelates; cobalt; copper; manganese; nickel; pyrazolone;

D O I：

10.1023/A:1016154909251

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Mn(II), Co(II), Ni(II) and Cu(II) chelates with 3-phenyl-4-(p-methoxyphenylazo)-5-pyrazolone have been synthesized and were characterized by elemental and thermal analyses as well as by IR, UV-VIS, H-1 NMR, conductometric and magnetic measurements. The first stage in the thermal decomposition process of these complexes shows the presence of water of hydration, the second denotes the removal of the coordinated water molecules. The final decomposition products were found to be the respective metal oxides. The data of the investigated complexes suggest octahedral geometry with respect to Co(II) 1:1, tetrahedral for Ni(II) 1:1 and 2:3; square planar for Cu(II) 1:1 and 2:3; the complexes with no coordinated water molecules (2:3) Co(II) and Mn(II) complexes are tetrahedral.

引用

页码：983 / 995

页数：13

共 21 条

[1] Synthesis and characterization of some 3-phenyl-4-arylazo-5-pyrazolones with La(III), Ce(III), Th(IV), and UO2(VI) complexes [J].