The Crystal and Molecular Structure of <I>N</I>-Salicylidene-α-aminoisobutyratoaquocopper(II)

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概要

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• The crystal structure of <I>N</I>-salicylidene-α-aminoisobutyratoaquocopper(II), [Cu{OOCC(CH<SUB>3</SUB>)<SUB>2</SUB>N=CHC<SUB>6</SUB>H<SUB>4</SUB>O}(H<SUB>2</SUB>O)], has been determined from the three-dimensional X-ray diffraction data. The crystals are monoclinic. The cell dimensions are: <I>a</I>=12.30, <I>b</I>=8.45, <I>c</I>=23.84 Å, and β=91.0°. The space group is P2<SUB>1</SUB>/c, with eight formula units in a unit cell. The structure has been refined by the least-squares method, with anisotropic temperature factors, to an <I>R</I>-value of 0.10. The molecular structures of the complex are essentially the same as those of <I>N</I>-salicyl ideneglycinatoaquocopper(II) hemihydrate and tetrahydrate. The environments of the copper(II) ions are square pyramidal, with one long and four short coordination bonds. The average distances of the two copper environments are: Cu–O, 1.912 and 1.945; Cu–N, 1.961; Cu–O(H<SUB>2</SUB>O), 1.989, and Cu–O′ (the bond to the carboxyl oxygen of the adjacent molecule), 2.344 Å. The average bond distances of N=C in the salicylaldimine residue and of N–C in the α-aminoisobutyrate group are 1.271 and 1.504 Å respectively. Neighboring molecules related by a center of symmetry are linked together alternately by hydrogen bonds and coordination bonds (Cu–O′), an infinite chain being formed along the <I>b</I>-axis. However, there are no interactions other than van der Waals forces along the <I>a</I>- and <I>c</I>-axes.

• 公益社団法人 日本化学会の論文

著者

• Nakahara Akitsugu

  Institute Of Chemistry College Of General Education Osaka University

• Muto Fumio

  Department of Applied Chemistry, Faculty of Engineering, Yamanashi University

• Komiyama Yoshimichi

  Department of Applied Chemistry, Faculty of Engineering, Yamanashi University

• Fujimaki Hiroto

  Department of Applied Chemistry, Faculty of Engineering, Yamanashi University

• Oonishi Isao

  Department of Applied Chemistry, Faculty of Engineering, Yamanashi University

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