Summary
Cobalt(III) complexes of 2-acetylpyridine 3-pyrrolidinyl-,3-piperidinyl-, 3-hexamethyleneiminyl- and 3-azabicyclo-[3.2.2]nonylthiosemicarbazone, [Co(Lpo)2]BF4, [Co-(Lpip)2]BF4, [Co(Lhexim)2]BF4 and [Co(Lbcn)2]BF4, respectively; 2-formylpyridine 3-piperidinyl-, 3-hexa-methyleneiminyl- and 3-azabicyclo[3.2.2]nonylthiosemi-carbazone, [Co(pip)2]BF4, [Co(hexim)2]BF4 and [Co(bcn)2]BF4, respectively; and aceylpyrazine 3-aza-bicyclo[3.2.2]nonylthiosemicarbazone, [Co(Pzbcn)2]BF4, have been synthesized and their spectral properties measured. The1H and13C-n.m.r. spectra show the uncomplexed thiosemicarbazones to be mixtures of as many as three isomers, and that the two ligands in the cobalt(III) complexes are nearly identical. The crystal structure of [Co(Pzbcn)2]BF4 shows the two ligands coordinated in a mer-configuration. Bond lengths and angles in this complex are compared with data previously reported for thiosemicarbazone complexes.
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Maichle, C., Castineiras, A., Carballo, R. et al. Spectral studies of cobalt(III) complexes of heterocyclic 3-azacyclothiosemicarbazones and the structure of the acetylpyrazine 3-azabicyclo[3.2.2]nonylthiosemicarbazone complex. Transition Met Chem 20, 228–233 (1995). https://doi.org/10.1007/BF00143482
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DOI: https://doi.org/10.1007/BF00143482