1972 Volume 45 Issue 7 Pages 2148-2155
Cobalt(I) tetraphenylporphin was prepared by reduction of tetraphenylporphinatocobalt(II) with sodium benzophenone ketyl in tetrahydrofuran (THF) and was purely isolated. The compound was identified as Na-[Co(I)TPP]·5THF (tetraphenylporphin is abbreviated to TPP). On the basis of electronic absorption spectrum, magnetic circular dichroism, magnetic susceptibility and NMR spectrum, the complex formed was concluded to be a complex of cobalt(I). Although some part of cobalt electron is migrated into the conjugated system of porphin, an electron furnished by the reducing reagent is mainly trapped by the central cobalt. The compound should be named sodium tetraphenylporphinatocobaltate(I).
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