AI Article Synopsis
- The study investigates how spiroconjugation affects the electronic spectrum of a newly synthesized metal complex, hexadecaethylspirodicorrolato-dinickel(II) (5), focusing on the changes in absorption bands.
- To compare results, a reference compound, tetraethylhexamethylisocorrolato nickel(II) (7), was synthesized for analysis.
- The findings show significant bathochromic shifts and variations in spectral intensities in the spiro-complex, with some changes attributed to the spiro effect, further supported by electrochemical redox potentials.
Article Abstract
In the present work the effect of spiroconjugation on the electronic spectrum of the recently synthesized metal complex hexadecaethylspirodicorrolato-dinickel(II) (5) (the corrole units in 5 are isoforms) is investigated. To have a suitable reference compound at our disposal, tetraethylhexamethylisocorrolato nickel(II) (7) has been prepared. On comparing the electronic spectra of this reference compound and the spiro-complex, bathochromic shifts of all absorption bands in the NIR/Vis-region are observed for the latter as well as marked changes in the spectral intensities. A detailed analysis of the spectra supported by semiempirical calculations reveals that at least part of the observed changes can be unambiguously attributed to the spiro effect. This effect is further affirmed by electrochemically measured redox potentials.
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| http://dx.doi.org/10.1002/chem.200305094 | DOI Listing |
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