Characterization and crystal structures of copper(II), cobalt(II), and nickel(II) complexes with two kinds of piperidine carboxylic acids |
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| Authors: | Yoshie Inomata Madoka Ando F Scott Howell |
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| Institution: | Department of Chemistry, Faculty of Science and Technology, Sophia University, 7-1 Kioicho, Chiyoda-ku, Tokyo 102-8554, Japan |
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| Abstract: | Copper(II) complex with 
-piperidine-3-carboxylic acid (
-Hpipe-3):Cu(
-pipe-3)2(H2O)] and cobalt(II) and nickel(II) complexes with piperidine-4-carboxylic acid (Hpipe-4):M(Hpipe-4)2(H2O)4]Cl2 (M: Co, Ni) have been prepared and characterized by means of IR and powder diffuse reflection spectra, thermal analysis, and magnetic susceptibility. The crystal structures of these complexes have been determined by X-ray diffraction. The crystal of Cu(
-pipe-3)2(H2O)] is orthorhombic with the space group Pbcn. The copper atom is in a square pyramidal geometry, ligated by two carboxylato oxygen atoms, two nitrogen atoms, and a water molecule. One molecule of this complex consists of either 
-piperidine-3-carboxylic acid or 
-piperidine-3-carboxylic acid. The crystals of M(Hpipe-4)2(H2O)4]Cl2 are monoclinic with space group P21/n. In these complexes the metal atom is in an octahedral geometry ligated by two carboxylato oxygen atoms and four water molecules. |
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| Keywords: | Piperidine carboxylic acid Crystal structure Copper complex Cobalt complex Nickel complex |
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