Journal article
Remote Substituent Effects in Pyrrole-2-carboxaldiminate Complexes of Copper(II)
Inorganic chemistry, Vol.17(8), pp.2161-2165
01 Aug 1978
Abstract
A number of copper(II) bis chelates with anions of pyrrole-2-carboxaldehyde Schiff bases have been synthesized. The amine substituents are phenyl moieties, which themselves bear in the para position a series of substituents, ranging from the electron-withdrawing nitro group to the relatively electron-releasing dimethyl amino group. Investigation of the Cun-Cu’ redox potentials shows that electron-withdrawing groups increase the stability of copper(I) relative to copper(II). There are correlations among E\¡2, the basicity of the precursor anilines, and the Taft parameter, °,of the ring substituent, the plot of nFEi/2/23RTvs. 2 ° having a slope of+1.28. ESR spectroscopy shows the complexes to have essentially square planar geometry. The response of the redox potential and the insensitivity of the ESR parameters to the ring substituents are discussed in relationship to structural properties of protein-bound copper.
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Details
- Title
- Remote Substituent Effects in Pyrrole-2-carboxaldiminate Complexes of Copper(II)
- Creators
- A W Addison - University of British ColumbiaJ H Stenhouse - University of British Columbia
- Publication Details
- Inorganic chemistry, Vol.17(8), pp.2161-2165
- Publisher
- Amer Chemical Soc
- Number of pages
- 5
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Identifiers
- 991022027637004721