✦ LIBER ✦

Hard and soft porphyrins: equilibrium constants for Cd2+ and Pb2+ with water-soluble free base porphyrins

✍ Scribed by Ray Hall Self; P. Hambright

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 64 KB
Volume: 04
Category: Article
ISSN: 1088-4246
DOI: 10.1002/(sici)1099-1409(200004/05)4:3<256::aid-jpp204>3.0.co;2-v

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✦ Synopsis

Equilibrium constants (1:1) for the reactions of cadmium(II) and lead(II) with water-soluble free base porphyrins of differing basicities (pK~3~) are reported. Soft porphyrins with low pK~3~ values favor the softer Cd (II), while harder porphyrins with higher pK~3~ values have more affinity for the relatively harder Pb (II) ion.