The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about The effect of π-π stacking interaction of the indole ring with the coordinated phenoxyl radical in a nickel(II)-salen type complex. Comparison with the corresponding Cu(II) complex, the main research direction is nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde preparation CD spectra; redox potential XANES nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde; frontier mol orbital nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde; crystal structure nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde complex.Category: quinoxaline.
To gain new insights into the effect of the π-π stacking interaction of the indole ring with the phenoxyl radical moiety as seen in the active form of galactose oxidase, the authors prepared Ni(II) complexes of a methoxy substituted salen-type ligand containing a pendent indole ring on the dinitrogen chelate backbone and characterized their 1-electron oxidized forms. The x-ray crystal structure anal. and the other physicochem. experiments of the Ni(II) complex revealed no significant intramol. interaction of the indole ring with the coordination plane. However, the x-ray crystal structures of the oxidized Ni(II) complex exhibited the π-π stacking interaction of the indole ring mainly with one of the two phenolate moieties. While the phenoxyl radical electron was delocalized on the two phenolate moieties in the Ni(II)-salen coordination plane, the phenolate moiety in close contact with the indole moiety was considered to be the initial oxidation locus, indicating that the indole ring interacted with the phenoxyl radical by π-π stacking. The UV-visible-NIR spectrum of the oxidized Ni(II) complex with the pendent indole ring was different from that of the complex without the side chain indole ring, but the differences were rather small in comparison with the oxidized Cu(II)-salen complexes with the π-π stacking interaction of the indole ring. Such differences are due to the electronic structure difference, the localized radical electron on one of the phenolate moieties in the oxidized Cu(II) complexes being more favorable for the π-π stacking interaction.
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