Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Magnetic Property of ${\mu}$-Peroxo-bis[bis(diphenylglyoximato)iron(Ⅲ)]

${\mu}$-Peroxo-bis[bis(diphenylglyoximato)iron(Ⅲ)]의 자기적 성질

  • Chong Shik Chin (Department of Chemistry, Sogang University) ;
  • L. Vaska (Department of Chemistry, Clarkson Coooege of Technoligy)
  • 진종식 (서강대학교 이공대학 화학과) ;
  • Published : 1980.06.30
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Abstract

It was observed that the magnetic moment for iron in $[(DPGH)_2FeO_2Fe(DPGH)_2]$, the oxygenation product of a octahedral iron(Ⅱ) complex, $[Fe(DPGH)_2(NH_3_2]$, decreases with decreasing temperature from ${\mu}$ = 3.60 B.M (Bohr Magneton) per iron at $298^{\circ}$K down to ${\mu}$ = 1.65 B.M per iron at $4.2^{\circ}K$. This observation may be explained by a weak antiferromagnetic coupling between two iron(Ⅲ) atoms of intermediate spin state (S = 3/2) in the molecule with the coupling constant $J = -l cm^{-1}$.

팔면체형 철(Ⅱ)착물 $[Fe(DPGH)_2(NH_3)_2$]과 산소분자의 반응에서 생성된 산소화생성물, $[(DPGH)_2FeO_2Fe(DPGH)_2$]의 자기모멘트를 측정하였다. 산소화 생성물내의 철에 대한 자기모멘트는 $298^{\circ}K$에서 3.60 B.M (Bohr Magneton)이며 온도가 내려 감에따라 감소되어 $4.2^{\circ}K$에선 1.65 B.M의 값을 보여준다. 이상의 측정결과는 다음과 같이 설명될 수 있다. (1) 산소화생성물내의 두개의 철(Ⅲ)은 중간스핀상태(S=3/2)를 갖는다. (2) 분자내의 두개의 철(Ⅲ)은 서로 약한 반강자성 짝지음을 일으킨다. 짝지음 상수는 정도이다.

Keywords

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