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11.
Molecular Modeling of 2-Hydroxy-4-methoxybenzophenone Substituted
Thiosemicarbazones and Their Cobalt(II) Complexes
Ahmed A. El-Asmy*1 and Wafaa M. Yousef 2
1Chemistry Department, Faculty of Science, Mansoura University,
Mansoura, Egypt
2Chemistry Department, Faculty of Education, Hail University, Hail,
King Saudi Arabia
E-mail:
aelasmy@yahoo.com
Abstract.
2-Hydroxy-4-methoxybenzophenone-N-substituted thiosemicarba-zones
were introduced to form [Co(HMBP4Ph-2H)(H2O)] and
[Co(HMBPpip-H)2(H2O)2]. The
complexes were identified by elemental analyses, molar
conductance, magnetic moment, IR and UV-Vis spectral studies.
The molecular parameters of the ligands and their Co(II)
complexes were calculated; [Co(HMBP4Ph-2H)(H2O)] is
found to be irregular tetrahedron while [Co(HMBPpip-H)2(H2O)2]
is distorted octahedron. The ligands lost the N2
proton or the N2 and OH protons on their reactions.
The deprotonation of the OH group is found more faster than the
SH. [Co(HMBP4Ph-2H)(H2O)] and [Co(HMBPpip-H)2(H2O)2]
measured magnetic moments for the square-planar and octahedral
configurations, respectively; this supported by the electronic
spectra in the solid and DMF solution. It was found that the
substitutent has a noticeable effect on the geometry of the
complex. The ligand field parameters (10Dq, B and β) were
calculated for the octahedral complex.
KEY WORDS: Complexes; 2-Hydroxy-4-methoxybenzophenone-N-substituted
thiosemi-carbazones; Magnetic moments.
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