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|1. [Evolutionary Nanomaterials & Nanodevices] Moo-Jin, Jun, Jin Woo Cheon, Sung Sil, Lee, Sung Rack, Choi
Cobalt(III) complexes of ethylenediamine-N,N′-di-S-isobutylacetic acid
Polyhedron, 8(24), 2889-2891 (Jan 1, 1989)
A new optically active ONNO-type tetradentate ligand, ethylenediamine-N,N′- di-S-isobutylacetate (SS-eniba), has been synthesized. During the preparation of diaqua cobalt(III) complexes of SS-eniba, [Co(SS-eniba)(H2O)2]+, the title ligand has coordinated stereospecifically to the cobalt(III) ion to give three isomers, Δ-s-cis, Δ-uns-cis and Λ-uns-cis, which have been isolated and characterized via electronic absorption, circular dichroism (CD), and 1H NMR spectroscopy, along with elemental analysis data. The preparation of Δ-s-cis-[Co(SS-eniba)Cl2]+ and Δ-s-cis-[Co(SS-eniba)CO3]+ are also reported.