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Cobalt(III), zinc(II), cadmium(II) and palladium(II) complexes with the hydrolysed and non-hydrolysed condensation products of 2-acetylpyridine with ethyl hydrazinoacetate: X-ray structure analysis of mer-bis{(E)-2-[N′-(1- pyridin-2-yl-ethylidene)hydrazino] acetato}cobalt(III) tetrafluoroborate

Journal of Coordination Chemistry, ISSN: 0095-8972, Vol: 58, Issue: 17, Page: 1541-1550
2005
  • 14
    Citations
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  • 9
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Metrics Details

  • Citations
    14
    • Citation Indexes
      14
  • Captures
    9

Article Description

Four Co(III), Zn(II), Pd(II) and Cd(II) complexes with ligands derived in situ from acetylpyridine and ethyl hydrazinoacetate or hydrolysed ethyl hydrazinoacetate were prepared. An X-ray structural analysis showed that the Co(III) complex is octahedral with two tridentate (E)-2-[N′-(1-pyridin-2- yl-ethylidene)hydrazino]acetate (apha) ligands, each forming two five-membered rings with the metal ion. In the tetrahedral Zn(II) complex, only a single apha ligand was coordinated, in the same way as that in the Co(III) complex. In the case of the tetrahedral Cd(II) complex the non-hydrolysed form of (E)-2-[N′-(1-pyridin-2-yl-ethylidene)hydrazino]acetic acid ethyl ester (aphaoet) coordinated as a bidentate and the two remaining coordination sites were occupied by Cl and CHCOO ions. In addition, the square-planar neutral Pd(II) complex was synthesized, having the same bidentate as in the Cd(II) complex and two Cl ions in the remaining coordination sites. Due to their being diamagnetic, all four complexes were characterized by H-NMR and C-NMR spectroscopy. © 2005 Taylor & Francis.

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