Summary
Two types of the CoII complexes L1Co (H2L1=N,N′-ethylenebis(isonitrosoacetylacetoneimine) were prepared. In type (a) the chelate rings are five-membered whereas in type (b) they are six-membered. The type (b) complexes were converted to type (a) in refluxing solutions. Half-ionization of the ligand is observed in the complexes HL1 Co(O2CMe) and HL1MnCl, where the chelate rings are five- and six-membered respectively. The octahedral complex L1FeCl·H2O has chelate rings of type (a) as does the complex L2Co (H2L2=unsymmetric Schiff baseN,N′-ethylene(isonitrosoacetylacetoneimineacetylacetoneimine). Twocis complexes (La 2Lb 3)Pd and (La 3)2Pd are characterized (HL3=isonitrosoacetylacetoneimine, (a) and (b) denote the type of chelate ring). Structures for the metal complexes and the sizes of the chelate rings are suggested on the basis of analytical and spectral evidence.
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Aly, M.M. Size and stability of chelate rings in coordination compounds of cobalt(II), manganese(II), iron(III) and palladium(II) with vicinal oxime-imine ligands. Transition Met Chem 15, 99–105 (1990). https://doi.org/10.1007/BF01023895
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DOI: https://doi.org/10.1007/BF01023895