Studies of iron(II) complexes with several Schiff bases: New examples of 5T2-1A1 equilibrium.
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概要
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Iron complexes with the Schiff bases of quinolinecarbaldehyde and pyridinecarbaldehyde were prepared. Mössbauer spectra and magnetic susceptibilities of the compounds, Fe(pipa)<SUB>2</SUB>(NCS)<SUB>2</SUB>, Fe(pa)<SUB>2</SUB>(NCS)<SUB>2</SUB>, Fe(pot)<SUB>2</SUB>(NCS)<SUB>2</SUB>·1/2CHCl<SUB>3</SUB>, Fe(ppt)<SUB>2</SUB>(NCS)<SUB>2</SUB>, Fe(ppca)<SUB>2</SUB>(NCS)<SUB>2</SUB>, and Fe(ppa)<SUB>2</SUB>(NCS)<SUB>2</SUB> were studied in the temperature range between 298 and 27 K. It was found that these complexes showed an incomplete <SUP>5</SUP>T<SUB>2</SUB>-<SUP>1</SUP>A<SUB>1</SUB> transition in the solid. The compound Fe(poca)<SUB>2</SUB>(NCS)<SUB>2</SUB> also showed a similar phenomenon. The observations of the behavior of the various complexes indicated that the magnetic changeover from spin-paired to spin-free would be closely associated with a modification of the crystal lattice. The FeL′Cl<SUB>2</SUB>(L′: the Schiff bases of quinolinecarbaldehyde) were found to have distorted tetrahedral structures.
- 公益社団法人 日本化学会の論文
著者
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Nishida Yuzo
Department Of Chemistry Faculty Of Science Yamagata University
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Maeda Yonezo
Department Of Chemistry And Physics Graduate School Of Sciences Kyushu University
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Takashima Yoshimasa
Department Of Chemistry Faculty Of Science Kyushu University
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