%0 Journal Article %1 Gloeckle.1998 %A Gloeckle, Markus %A Kaim, Wolfgang %A Fiedler, Jan. %D 1998 %J Organometallics %K bridged complex complex;mixed complex;osmium delocalization;spectroelectrochem dinuclear electrochem osmium oxidn prepn pyrazine valence %N 23 %P 4923--4925 %R 10.1021/OM980586M %T Valence Delocalization despite Weak Metal-Metal Coupling in a Bis(organoosmium(III,II)) Complex with a Pyrazine Bridge %V 17 %X Carbonyl vibrational spectroelectrochem. of (μ-pz)Os(PiPr3)2(CO)(H)Cl20/+ in dichloromethane reveals valence delocalization of the mixed-valent state despite relatively weak metal-metal coupling, as evident from the comproportionation const. Kc = 104.3 and the intervalence charge-transfer band at 1705 nm (e = 1250 M-1 cm-1, Dn1/2 = 3700 cm-1). The rather low charge and nonpolar medium, i.e., the absence of valence trapping by counterions or solvent mols., favor this particular situation. on SciFinder(R)

@article{Gloeckle.1998, abstract = {Carbonyl vibrational spectroelectrochem. of {(μ-pz)[Os(PiPr3)2(CO)(H)Cl]2}0/+ in dichloromethane reveals valence delocalization of the mixed-valent state despite relatively weak metal-metal coupling, as evident from the comproportionation const. Kc = 104.3 and the intervalence charge-transfer band at 1705 nm (\textgreek{e} = 1250 M-1 cm-1, \textgreek{Dn}1/2 = 3700 cm-1). The rather low charge and nonpolar medium, i.e., the absence of valence trapping by counterions or solvent mols., favor this particular situation. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Gloeckle, Markus and Kaim, Wolfgang and Fiedler, Jan.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/20d01fac4d94e4cf3b665bacaa9a7d77a/huebleriac}, doi = {10.1021/OM980586M}, interhash = {9be7c5bab07080bb3df97b131144d3f5}, intrahash = {0d01fac4d94e4cf3b665bacaa9a7d77a}, issn = {0276-7333}, journal = {Organometallics}, keywords = {bridged complex complex;mixed complex;osmium delocalization;spectroelectrochem dinuclear electrochem osmium oxidn prepn pyrazine valence}, number = 23, pages = {4923--4925}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Valence Delocalization despite Weak Metal-Metal Coupling in a Bis(organoosmium(III,II)) Complex with a Pyrazine Bridge}, volume = 17, year = 1998 }