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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 6, Number 6
June 20, 1985 

The Stereochemistry of the Metal Complexes of Novel Stereospecific Quadridentate Ligands, Cobalt(Ⅲ) Complexes of N,N'-dimethylethlenediamine-N,N'-di-α-propionato and N,N'-dimethlethylenediamine-N,N'-diacetato Ligands
Moo-Jin Jun, Jin-Seung Jung, Chang Hwan Kim
A new flexible quadridentate ligand, N,N'-dimethylethylenediamine-N,N'-di-α-propionic acid (dmedpa) has been synthesized, and diammine and ethylenediamine cobalt(Ⅲ) complexes of dmedpa, [Co(dmedpa)(NH3)2]+ and [Co(dmedpa(en)]+, have been prepared. Only s-cis isomer has been yielded. A known N,N'-dimethylethylenediamine-N,N'-diacetic acid (dmedda) has also been prepared. Dichloro cobalt(Ⅲ) complexes of both dmedda and dmedpa have been prepared. Only the s-cis isomer has been yielded in the [Co(dmedda)Cl2]- complex, while only the uns-cis isomer has been obtained for the [Co(dmedpa)Cl2]- complex.
369 - 374
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