Syntheses and Structures of (MCl(NN)(dpt))2+(M=Co, Rh; NN=bpy, phen) Complexes.

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The cobalt (III) and rhodium (III) complexes containing a terdentate ligand (bis (3-aminopropyl)amine, abbreviated as dpt) which forms two six-membered chelate rings, and a bidentate ligand (2, 2'bipyridine or 1, 10-phenanthroline, abbreviated as bpy or phen, respectively) forms a plane five-membered chelate ring, [CoC1(bpy) (dpt) ]2+, [CoCl (phen) (dpt) ]2+, [RhC1 (bpy) (dpt) ]2+, and [RhCl(phen) (dpt)]2+, were prepared. The crystal structures of the perchlorate salts were determin ed by X-ray diffraction method as mer-endo(Cl, NH)-isomer (Fig.1 (a)) for two cobalt (III) complexes, and as mer-exo (Cl, NH)-isomer (Fig.1 (b) ) for two rhodium (III) ones. All the six-membered chelate rings formed by dpt ligand adopted chair conformation. The analogous cobalt (III) complexes containing a terdentate rigand (N-(2-aminoethyl)-1, 3-propanediamine, abbreviated as aepn) which forms a five- and a six-membered chelate rings, [CoCl(bpy) (aepn) ]2+ and [CoCl(phen) (aepn)]2+, were also prepared. The structures of the complexes were identified on the basis of the spectroscopic data as the mer-type. For all the complexes prepared in this work, no fac-isomers were obtained or detected.
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