Synthesis and Stereochemistry of the Complexes of Cobalt(III) with New Tetradentate Ligands. Cobalt(III) Complexes of Ethylenediamine-N,N'-di-${\alpha}$-butyric Acid

Synthesis and Stereochemistry of the Complexes of Cobalt(III) with New Tetradentate Ligands. Cobalt(III) Complexes of Ethylenediamine-N,N'-di-${\alpha}$-butyric Acid

A new flexible $N_2O_2$-type tetradentate ligand, ethylene-diamine-N,N'-di-${\alpha}$-butyric acid (eddb), has been synthesized, and a series of cobalt (III) complexes of eddb, $[Co(edda)(L)]^{n+}$ (L = $Cl_2$, $(H_2O)_2$, $Cl\;H_2O$, and $Co^2_3$), have been prepared. Only s-cis isomers have been yielded during the preparation of complexes. Ring strain is cited as the primary cause for the preference for the s-cis geometric configuration.

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