Complexes of folic acid, lumiflavin and riboflavin with bis(2,2'-bipyridine)ruthenium(II). Facilitated formation of flavosemiquinone complexes and substantial decrease of pKa(NH)
Folic acid, lumiflavin, and riboflavin bind one Ru(bpy)22+ complex fragment (bpy = 2,2'-bipyridine). In view of previous results for lumazine and methoxatine complexes, the appearance of characteristically pH-dependent metal-to-ligand charge-transfer spectra and a facilitated ligand redn. strongly suggest an a-iminocarbonyl chelate coordination of the metal at positions O(4) and N(5). The pKa values of the heterocyclic N(3)-H protons are lowered from $\sim$9 to $\sim$5 upon metal coordination. [on SciFinder(R)]
%0 Journal Article
%1 Schwederski.1992
%A Schwederski, Brigitte
%A Kaim, Wolfgang.
%D 1992
%J Inorganica Chimica Acta
%K acid bipyridine complex complex;ruthenium folic lumiflavin riboflavin ruthenium
%N 1
%P 123--126
%R 10.1016/S0020-1693(00)83859-1
%T Complexes of folic acid, lumiflavin and riboflavin with bis(2,2'-bipyridine)ruthenium(II). Facilitated formation of flavosemiquinone complexes and substantial decrease of pKa(NH)
%V 195
%X Folic acid, lumiflavin, and riboflavin bind one Ru(bpy)22+ complex fragment (bpy = 2,2'-bipyridine). In view of previous results for lumazine and methoxatine complexes, the appearance of characteristically pH-dependent metal-to-ligand charge-transfer spectra and a facilitated ligand redn. strongly suggest an a-iminocarbonyl chelate coordination of the metal at positions O(4) and N(5). The pKa values of the heterocyclic N(3)-H protons are lowered from $\sim$9 to $\sim$5 upon metal coordination. [on SciFinder(R)]
@article{Schwederski.1992,
abstract = {Folic acid, lumiflavin, and riboflavin bind one Ru(bpy)22+ complex fragment (bpy = 2,2'-bipyridine). In view of previous results for lumazine and methoxatine complexes, the appearance of characteristically pH-dependent metal-to-ligand charge-transfer spectra and a facilitated ligand redn. strongly suggest an \textgreek{a}-iminocarbonyl chelate coordination of the metal at positions O(4) and N(5). The pKa values of the heterocyclic N(3)-H protons are lowered from $\sim$9 to $\sim$5 upon metal coordination. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Schwederski, Brigitte and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/225537c2842610591d9738aadc77a351f/huebleriac},
doi = {10.1016/S0020-1693(00)83859-1},
interhash = {993d91ecdca26b470ad20743834e8041},
intrahash = {25537c2842610591d9738aadc77a351f},
issn = {0020-1693},
journal = {Inorganica Chimica Acta},
keywords = {acid bipyridine complex complex;ruthenium folic lumiflavin riboflavin ruthenium},
number = 1,
pages = {123--126},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {Complexes of folic acid, lumiflavin and riboflavin with bis(2,2'-bipyridine)ruthenium(II). Facilitated formation of flavosemiquinone complexes and substantial decrease of pKa(NH)},
volume = 195,
year = 1992
}
