Syntheses, Structural Characterization of Fe and Ni Complexes with Polypyrazolyl Borate Ligand:Fe[HB(pz)3]2 and Ni[HB(pz)3]2

Abstract

Abstract: Fe(Ⅱ) complex Fe[HB(pz)₃]₂(compound 1, pz=pyrazole) and Ni(Ⅱ) complex Ni[HB(pz)₃]₂(compound 2) have been obtained by the reaction of MCI₂(M=Fe and Ni) with NaHB(pz)₃ in MeOH. The two complexes(compounds 1 and 2) were characterized by IR, NMR, elemental analysis and X-ray diffraction. Compound 1 crystallizes in space group P2₁/c with a=1.224(3) nm, b=1.161(2) nm, c=1.648(3) nm, β=107.62(15)°, V=2.233(8) nm³, Z=2. Compound 2 crystallizes in space group P2₁/c with a=0.97926(18) nm, b=1.7423(3) nm, c=1.3156(2) nm, β=97.055(16)°, V=2.2277(7) nm³, Z=4. The results of X-ray structural analyses show that both compounds 1 and 2 are monomeric neutral, possessing a similar coordination mode and a similar structure around the metal centers. The related spectral characterizations, steric effects and binding properties are discussed.

Key words: Polypyrazolylborate, Fe and Ni complexes, Crystal structure

XING Yong-heng, Katsuyuki Aoki, BAI Feng-ying. Syntheses, Structural Characterization of Fe and Ni Complexes with Polypyrazolyl Borate Ligand:Fe[HB(pz)₃]₂ and Ni[HB(pz)₃]₂[J]. Chemical Research in Chinese Universities, 2005, 21(4): 396-400.

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Syntheses, Structural Characterization of Fe and Ni Complexes with Polypyrazolyl Borate Ligand:Fe[HB(pz)₃]₂ and Ni[HB(pz)₃]₂

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