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lili0323

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[求助] 帮忙翻译一下这几个问题

1.Rationalize the relative magnitudes of the binding constants for Cu2+ and the following ligands: Cu(NH3)42+, lgβ4 ~ 13.1; Cu(en)22+, lgβ2 ~ 19.9; Cu(trien)2+, lgβ1 ~ 20.5; Cu(cyclen)2+, lgβ1 ~ 24.2, where en = ethylenediamine, trien = triethylenetriamine, and cyclen is a cyclic ligand with four nitrogens linked through ethylene chains.
2.Why can d-d energies be more readily estimated from CoIII(NH3)5X absorption spectra than for from NiII(NH3)5X spectra?

3.A zinc finger is a DNA binding motif that is formed from a peptide sequence that binds a zinc ion in a tetrahedral site formed by cysteine and histidine residues. Cobaltous ion can compete for the zinc binding site as shown.

Peptide-Zn2+ + Co(H2O)62+ ↔ Peptide-Co2+ + Zn(H2O)62+
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