1995 Fiscal Year Final Research Report Summary
MOLECULAR DESIGN AND SYNTHESIS OF COMPOSITE BI-AND POLY-NUCLEAR COMPLEXES.
| Project/Area Number |
06640731
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic chemistry
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| Research Institution | OSAKA CITY UNIVERSITY |
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Principal Investigator |
KINOSHITA Isamu OSAKA CITY UNIVERSITY,DEPARTMENT OF CHEMISTRY,ASSOCIATE PROFESSOR, 理学部, 助教授 (80128735)
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| Co-Investigator(Kenkyū-buntansha) |
KITANO OSAKA PREFECTURAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF LIBERAL ARTS LECTURER, 講師 (20234263)
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| Project Period (FY) |
1994 – 1995
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| Keywords | MIXED METAL COMPLEX / PLATINUM (II) / CHROMIUM (III) / ONE DIMENSIONAL STRUCTURE / HELIX / VANADIUM (IV) / BINUCLEAR COMPLEX |
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| Research Abstract |
In this research, the composite binuclear complex was prepared from [Pt (4-mpyt) _4] ^<2+> using the metal incorporating ability of this complex. The late transition metals as Ni (II) and Co (II) can be incorporated in this system with moderate yield. Both complexes have square planar structure for Pt (II), and tetragonal pyramidal either for Ni (II) and Co (II). The apical ligation to Co or Ni contribute for the stabilization of the system. Both complexes increase the inter metallic interaction upon oxidation to d^7-d^7 system, formally no apparent interaction present for the system. Especially, [Pt^<III> (4-mpyt) _4Co^<II>X] has strong inter metallic interaction causing diamagnetism as a result. The early transition metals can be incorporated in the form of its oxides as V=O or Cr=O.Especially, Cr (IV) has quite unique coordination sphere in this system that never happened in the mononuclear system. Furthermore, Cr (III) complex, [Pt (4-mpyt) _4Cr^<III>Cl], is surrounded by five ligating atoms with square pyramidal fashion that never appeared in Cr (III) state.
The x-ray structural results show the evidence as follows. (1) Regardless of early or late, first transition metals can form [Pt (4-mpyt) _4MX] molecule. Four N atoms coordinate to first transition metals due to the hard metal preference compared to the soft S atoms. (3) In the case of [Pt (4-mpyt) _4Cr=O] or [Pt (4-mpyt) _4V=O], the complexes are crystallizes in the space group P4/ncc. As a result, the inter-molecular linkage through molecular 4 fold axis forms crystallographic 4 fold axis and making up the one dimensional system.
Dipyridine disulfide formed by the oxidation of pyridine thiol is widely used as a bio assay reagent or the synthet
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[Publications] T.Tanase, M.Kato, Y.Yamada, K.Tanaka, K.Lee, Y.Sugihara, A.Ichimura, I.Kinoshita, M.Haga, Y.Sasaki, Y.Yamamoto, T.Nagano, S.Yano: "Synthesis and Characterization of (m-Alkoxo) bis (mu-carboxylato) diruthenium Complexes, Na [Ru_2 (dhpta) (m-O_2CR) _2]. A Ruthenium Analogue of Model Systems for Iron-oxo Proteins" Chemistry Letters, 1994. 1853-1856 (1994)
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