Synthesis and characterization of manganese(II), nickel(II) and copper(II) complexes of 4-(arylideneamino)-3-mercapto-6-methyl-1,2,4-triazin-5(4H)-ones

Article abstract of DOI:10.1080/00945710009351813

Manganese(II), nickel(II) and copper(II) complexes of 4-(2,6-dichlorobenzylidene-amino)-3-mercapto-6-methyl-1,2,4-triazin-5(4H)-one (HL¹) and 4-(cinnamylidene-amino)-3-mereapto-6-methyl-1,2,4-triazin-5(4H)-one (HL²) have been synthesized and characterized. The IR spectra indicate that both HL¹ and HL² act as neutral or monobasic bidentate ligands, coordinating to metal ions via azomethine-N and either carbonyl-O or (thiolo or thiono)-S, depending on the metal ion. The magnetic and spectroscopic data suggest a distorted-octahedral geometry for the Ni(II) complexes, a square-planar geometry for [L¹CuCl(H₂O)], a dimeric distorted octahedral geometry for both [(L²)₂Cu(H₂O)]₂ and [(HL)Mn(SO₄)(H₂O)₂]₂. Such dimeric structures have been revealed by the subnormally low μ_eft values for the Mn(II) complexes, due to antiferromagnetic coupling between the two Mn(II) centers, and the diamagnetism of [(L²)₂Cu(H₂O)]₂ is due to a quenching mechanism. ESR parameters support the structures of the Mn(II) and Cu(II) complexes and that the two azomethine nitrogens are coordinated to the Cu(II) ion in the [(L²)₂Cu(H₂O)]₂ complex. DTA studies of the maganese(II) and copper(II) complexes are also reported.

Full text of DOI:10.1080/00945710009351813

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Synthesis and Reactivity in
Inorganic and Metal-Organic
Chemistry
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Synthesis and Characterization
of Manganese(II), Nickel(II)
and Copper(II) Complexes
of 4-(Arylideneamino)-3-
Mercapto-6-Methyl-1,2,4-
Triazin-5(4H)-Ones
Samir S. Kandil a , Nasser R. El-Brollosy a & Ali El-
Dissouky b
a Chemistry Department, Faculty of Science , Tanta
University , Tanta, Egypt
b Chemistry Department, Faculty of Science ,
Alexandria University , Alexandria, Egypt
Published online: 28 Apr 2008.
To cite this article: Samir S. Kandil , Nasser R. El-Brollosy & Ali El-Dissouky (2000)
Synthesis and Characterization of Manganese(II), Nickel(II) and Copper(II) Complexes
of 4-(Arylideneamino)-3-Mercapto-6-Methyl-1,2,4-Triazin-5(4H)-Ones, Synthesis
and Reactivity in Inorganic and Metal-Organic Chemistry, 30:6, 979-995, DOI:
10.1080/00945710009351813
To link to this article: http://dx.doi.org/10.1080/00945710009351813
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