Synthesis, structure and magnetic properties of pyrazolate-bridged dinuclear complexes [{M(NCS)(4-Phpy)}2(μ-bpypz)2] (M = Co2+ and Fe2+)

Ko Yoneda, Keisaku Nakano, Junji Fujioka, Koichi Yamada, Takayoshi Suzuki, Akira Fuyuhiro, Satoshi Kawata, Sumio Kaizaki

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23 Citations (Scopus)


The synthesis and magnetic characterization of pyrazolato-bridged dinuclear complexes [{M(NCS)(4-Phpy)}2(μ-bpypz)2] (Hbpypz = 3,5-bis(2-pyridyl)-pyrazole; 4-Phpy = 4-phenylpyridine; M = Co2+ (1) and Fe2+ (2)) are described together with the X-ray crystal analysis of the cobalt complex. The structure of 1 shows that the desired coordination has been achieved with the cobalt atoms being coordinated to two bpypz to form the dimer. The X-ray diffraction patterns show 1 and 2 to be isomorphous at room temperature. 2 displays a single spin-crossover transition between the [HS-HS] and [LS-LS] states with Tc = 150 K.

Original languageEnglish
Pages (from-to)2437-2442
Number of pages6
Issue number16-17
Publication statusPublished - Nov 17 2005
Externally publishedYes


  • 3,5-Bis(2-pyridyl)-pyrazole
  • 4-Phenylpyridine
  • Dinuclear complex
  • Spin-crossover

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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