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Cobalt(II) complexes of creatinine
Srinivasan Muralidharan, M. Ramakrishna Udupa
Published in Kluwer Academic Publishers
Volume: 9
Issue: 6
Pages: 218 - 220
Cobalt(II) complexes of creatinine [Co(creat)2X2] (X = Cl, Br, I or NCS) and [Co(creat)2X2(H2O)2] (X = HCO2, HOCH2CO2 or CNCH2CO2) have been prepared. Their i.r. spectra show an increase in ν(NH) of the cyclic secondary amine group, compared to free ligand (3300 cm-1), indicating that cyclic nitrogen is involved in coordination. The thiocyanate group coordinates through nitrogen and carboxylates coordinate as univalent unidentate ligands. The electronic spectra and magnetic moments suggest a d7 configuration for cobalt: a tetrahedral geometry (4.4 B.M.) for halide and thiocyanate complexes, and an octahedral geometry (5.0 B.M.) for the carboxylate complexes. On heating, the ligand moiety is lost and the respective cobalt halide or cobalt carboxylate is formed, which is converted finally into Co3O4. There is a correlation between the high intensity electronic transitions and the polarographic half-wave potentials. © 1984 Verlag Chemie GmbH.
About the journal
JournalTransition Metal Chemistry
PublisherKluwer Academic Publishers
Open AccessNo
Concepts (1)
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    Cobalt compounds