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- W39347861 abstract "Publisher Summary This chapter focuses on the electronic structure of metal–porphyrins. The fundamental idea of the ligand-field approach is that the effect of the environment of a metal ion is not the same for all the d orbitals and that many of the characteristic properties of transition-metal compounds depend on just this differential effect of the environment. The immediate environment of a metal ion in a porphyrin or phthalocyanine derivative consists of the four coplanar nitrogen atoms of the macrocyclic ring and up to two further groups. In nickel phthalocyanine, for example, the fifth and sixth coordination positions are empty, in ferric phthalocyanine chloride the metal atom is probably five coordinated, while in the biologically important heme derivatives the Fe++ or Fe+++ ions are believed to be six coordinated. In the biologically important heme compounds, the environment seems more nearly octahedral and no intermediate-spin derivatives are known." @default.
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- W39347861 date "1961-01-01" @default.
- W39347861 modified "2023-09-23" @default.
- W39347861 title "THE ELECTRONIC STRUCTURE AND ELECTRON TRANSPORT PROPERTIES OF METAL IONS PARTICULARLY IN PORPHYRIN COMPLEXES" @default.
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- W39347861 doi "https://doi.org/10.1016/b978-1-4831-9646-6.50008-9" @default.
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