Abstract
59Cq NMR (94.45 MHz) has been used to study CoIII complexes formed by reaction of cobalt(II) chloride with 2- and 3-aminoalcohols; mononuclear molecular tris-O,N-chelate complexes of CoIIIL3 (L = NH2CH2CH2O– and NH2CH2CH2CH2O–) are produced in both geometric mer- and fac-forms, the mer-isomers being thermodynamically unstable and spontaneously rearranging to the fac-form in solution; the analogous complex L = NH2CHEtCH2O– exists only in the fac-form; 2-aminoalcohols also yield trinuclear complexes [CoII(CoIIIL3)2]2+, in which pseudo-contact interaction of the CoII and CoIII atoms occurs; the crystal structure of {CoII[CoIII(NH2CH2CH2O)3]2}·Cl3(NH3CH2CH2OH)·2H2O has been determined.
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