The crystal and molecular structure of (N-benzyl-L-alaninato)-(n,n'-ethylenebis(.ALPHA.-methylsalicylideneaminato))-cobalt(III) trihydrate.

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概要

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• The crystal and molecular structure of the title complex (−)<SUB>435</SUB>-<I>Λ</I><SUB>RS</SUB>-β<SUB>2</SUB>(mer)-[Co(α-Me-sal<SUB>2</SUB>en)(<I>N</I>-Bz-L-ala)]·3H<SUB>2</SUB>O, has been determined by single crystal X-ray analysis. The crystals are orthorhombic, space group P2<SUB>1</SUB>2<SUB>1</SUB>2<SUB>1</SUB>, with unit cell dimensions <I>a</I>=19.247(8), <I>b</I>=14.162(4), <I>c</I>=10.329(4) Å, and <I>Z</I>=4. The structure was solved by the heavy-atom method and refined by block-diagonal least-squares technique, using 1624 independent reflections, to the final <I>R</I>-value of 0.080. The molecular structure is of a <I>Λ</I><SUB>RS</SUB>-<I>cis</I>-β<SUB>2</SUB>(mer) type in which two coordination sites of a distorted octahedron are occupied by the <I>N</I>-Bz-L-ala group and the others by the quadridentate α-Mesal<SUB>2</SUB>en Schiff-base ligand in a nonplanar configuration. The Co–O and Co–N bon lengths, 1.938(12) and 1.989(15) Å respectively, of the <I>N</I>-Bz-L-ala group are significantly longer than the usual values. The molecule is distinctly strained as shown by the bond angles of the ligands and those of the cobalt(III) coordination polyhedron. The water molecules form a hydrogen bonded chain linking phenolate and carboxylate oxygens of different molecules along the crystallographic c axis.

• 公益社団法人 日本化学会の論文

著者

• YONEDA Hayami

  Department of Chemistry, Faculty of Science, Hiroshima University

• Kushi Yoshihiko

  Department Of Chemistry Graduate School Of Science Osaka University

• Fujii Yuki

  Department Of Chemistry Faculty Of Science Ibaraki University

• Tada Toshiji

  Department Of Biological Science Graduate School Of Science Osaka Prefecture University

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