Thiolate-bridged metal complexes. Nickel(II), palladium(II), and cobalt(III) binuclear complexes of 1,5-diamino-3-pentanethiol.

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概要

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• A binucleating ligand with thiolate sulfur as a bridging atom, 1,5-diamino-3-pentanethiol (Hdpet) and its metal complexes, Ni<SUB>2</SUB>(dpet)<SUB>2</SUB>X<SUB>2</SUB> (X=Br, ClO<SUB>4</SUB>, NO<SUB>3</SUB>, BPh<SUB>4</SUB>, and NCS) were synthesized. All the complexes are diamagnetic at room temperature. The Ni(II) and Pd(II) complexes assume binuclear thiolate-bridged square planar coordination. This structure is maintained even in aqueous solution. The electronic spectra of the Ni(II) complexes showed a band at 27.3×10<SUP>3</SUP> cm<SUP>−1</SUP> corresponding to the 29.8×10<SUP>3</SUP> cm<SUP>−1</SUP> band of [Ni<SUB>2</SUB>(dpl)<SUB>2</SUB>]<SUP>2+</SUP> which is characteristic of oxo-bridged Cu(II) and Ni(II) complexes and was assigned to the pπ(O)→dσ(metal) transition. Several trials by different methods only resulted in the separation of a single species of Co(III) complex, Co<SUB>2</SUB>(dpet)<SUB>3</SUB>(ClO<SUB>4</SUB>)<SUB>3</SUB>. This was characterized as a bioctahedron facially joined at the three thiolate sulfur atoms.

• 公益社団法人 日本化学会の論文

著者

• Kida Sigeo

  Department of Chemistry Wakayama University

• Murase Ichiro

  Laboratory of Chemistry, College of General Education, Kyushu University 01

• Ueno Shigehiro

  Department of Chemistry, Faculty of Science, Kyushu University

• Murase Ichiro

  Laboratory of Chemistry, College of General Education, Kyushu University

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