X-Ray Study of the Compound Obtained by the Reaction of <I>N</I><SUP>δ</SUP>-Salicylidene-L-ornithine and Palladium(II) acetate. The Crystal Structure of (<I>N</I><SUP>α</SUP>-Salicylidene-D-ornithinato) (<I>N</I><SUP>α</SUP>-Salicylidene-L-ornithinato)di

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概要

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• X-Ray structure analysis has elucidated that the reaction of <I>N</I><SUP>δ</SUP>-salicylidene-L-ornithine and palladium(II) acetate in DMF results in the amine exchange and racemization of the ligand, yielding (<I>N</I><SUP>α</SUP>-salicylidene-D-ornithinato)(<I>N</I><SUP>α</SUP>-salicylidene-L-ornithinato)dipalladiuna(II). The yellow crystals are monoclinic, <I>a</I>=15.15(2), <I>b</I>=9.80(1), <I>c</I>=15.67(2) Å, β=111.3(1)°, space group <I>P</I>2<SUB>1</SUB>⁄<I>c</I>, and <I>Z</I>=2. The structure was solved by the Patterson and Fourier techniques and was refined by the least-squares method to <I>R</I>=0.105. The complex molecule has a center of symmetry by which D- and L-Schiff-base ligands are interrelated. Each Pd atom has a square-planar coordination by means of two O and N<SUP>α</SUP> atoms of one ligand, and the N<SUP>δ</SUP> atom of the other one, the two N atoms being in the <I>trans</I> position. The H<SUB>2</SUB>N<SUP>δ</SUP>–(CH<SUB>2</SUB>)<SUB>3</SUB>–CH–N<SUP>α</SUP> fragments of the two ligands bridge the two Pd atoms, giving a 14-membered ring.

• 公益社団法人 日本化学会の論文

著者

• Matsumoto Keiji

  Department Of Applied Physics Graduate School Of Engineering Yokohama National University

• Kojima Yoshitane

  Department Of Chemistry Faculty Of Science Osaka City University

• Matsui Masanori

  Kanazawa Medical University

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