%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 }