Synthesis and Symmetry of Two Cobalt(III) Complexes with Tetradentate Ligands.

• Autores: Mark McClure
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 85, Nº 3, 2008, págs. 420-421
• Idioma: inglés
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• Resumen

  • In this laboratory exercise, students synthesize two series of cobalt(III) complexes prepared from the tetradentate ligands triethylenetetramine and tris(2-aminoethyl)amine. Although these two ligands have the same chemical formula, the former is linear and the latter is branched, giving rise to complexes with different symmetries. Whereas triethylenetetramine coordinates to form a complex that has a C2 symmetry axis, tris(2-aminoethyl)amine forms a complex that has a mirror plane. The symmetries of the corresponding complexes are examined through the use of 13C NMR spectroscopy.