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Synthesis and Characterization of Mononuclear Octahedral Fe(III) Complex Containing a Biomimetic Tripodal Ligand, N-(Benzimidazol-2-ylmethyl)iminodiacetic Acid
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  • Synthesis and Characterization of Mononuclear Octahedral Fe(III) Complex Containing a Biomimetic Tripodal Ligand, N-(Benzimidazol-2-ylmethyl)iminodiacetic Acid
  • Synthesis and Characterization of Mononuclear Octahedral Fe(III) Complex Containing a Biomimetic Tripodal Ligand, N-(Benzimidazol-2-ylmethyl)iminodiacetic Acid
저자명
Moon. Do-Hyun,Kim. Jung-hyun,Lah. Myoung-Soo
간행물명
Bulletin of the Korean Chemical Society
권/호정보
2006년|27권 10호|pp.1597-1600 (4 pages)
발행정보
대한화학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The mononuclear iron complex 1, $Fe^{III}$(Hbida)Cl($H_2O$), was synthesized using a tripodal tetradentate ligand, N-(benzimidazol-2-ylmethyl)iminodiacetic acid (H3bida), which has two carboxylate groups, one benzimida- zoyl group, and one tertiary amine where it serves as a tetradentate chelating ligand for the octahedral Fe(III) ion. The four equatorial positions of the octahedral complex are occupied by two monodentate carboxylates, a benzimidazole nitrogen, and an oxygen of a water molecule. One of the axial positions is occupied by an apical nitrogen of the Hbida and the other by a chloride anion. The mononuclear octahedral complex 1 mimics the geometry of the key intermediate structure of the catalytic reaction cycle proposed for the FeSODs, which is a distorted octahedral geometry with three histidyl imidazoles, an aspartyl carboxylate, a superoxide anion, and a water molecule. The redox potential of complex 1, $E_{1/2}$ is -0.11V vs. Ag/AgCl (0.12 V vs. NHE), which is slightly lower than those reported for the most FeSODs. The magnetic susceptibility of complex 1 at room temperature is 5.83 $mu$B which is close to that of the spin only value, 5.92 $mu$B of high-spin d5 Fe(III).