Characterization of the mixed-valent intermediate (n = 3) of the complex series (μ,η3:η3-L)Ru(terpy)2n+ with the unsaturated bridging ligand N,N'-bis(a-picolinoyl)hydrazido(2-) = L2-
N,N'-Bis(a-picolinoyl)hydrazine (H2L), a potentially bis-tridentate conjugated ligand in its doubly deprotonated form L2-, was used to synthesize the diruthenium(II) complex (μ-L)Ru(terpy)2(PF6)2. Its electrochem. and spectroelectrochem. (UV-visible-NIR, EPR) study reveals a mixed-valent (RuIIIRuII) intermediate with electrochem. and spectroscopic characteristics related to those of the (μ-adc-R)Ru(bpy)223+ ions (adc-R2-= bis-bidentate C-substituted diacylhydrazido(2-) ligands): comproportionation const. Kc = 109.0 (CH2Cl2), intervalence charge transfer band at 1000 nm (e=3800 M-1 cm-1), EPR signal at g$\bot$ = 2.14, g‖ = 1.953. The noninnocent nature of Ln- is inferred from comparative anal. of the spectroscopic data. on SciFinder(R)
%0 Journal Article
%1 Knoedler.2004
%A Knoedler, Axel
%A Fiedler, Jan
%A Kaim, Wolfgang.
%D 2004
%J Polyhedron
%K complex complex;ESR complex;ruthenium dinuclear electrochem picolinoylhydrazido prepn redn ruthenium terpyridine
%N 4
%P 701--707
%R 10.1016/j.poly.2003.11.043
%T Characterization of the mixed-valent intermediate (n = 3) of the complex series (μ,η3:η3-L)Ru(terpy)2n+ with the unsaturated bridging ligand N,N'-bis(a-picolinoyl)hydrazido(2-) = L2-
%V 23
%X N,N'-Bis(a-picolinoyl)hydrazine (H2L), a potentially bis-tridentate conjugated ligand in its doubly deprotonated form L2-, was used to synthesize the diruthenium(II) complex (μ-L)Ru(terpy)2(PF6)2. Its electrochem. and spectroelectrochem. (UV-visible-NIR, EPR) study reveals a mixed-valent (RuIIIRuII) intermediate with electrochem. and spectroscopic characteristics related to those of the (μ-adc-R)Ru(bpy)223+ ions (adc-R2-= bis-bidentate C-substituted diacylhydrazido(2-) ligands): comproportionation const. Kc = 109.0 (CH2Cl2), intervalence charge transfer band at 1000 nm (e=3800 M-1 cm-1), EPR signal at g$\bot$ = 2.14, g‖ = 1.953. The noninnocent nature of Ln- is inferred from comparative anal. of the spectroscopic data. on SciFinder(R)
@article{Knoedler.2004,
abstract = {N,N'-Bis(\textgreek{a}-picolinoyl)hydrazine (H2L), a potentially bis-tridentate conjugated ligand in its doubly deprotonated form L2-, was used to synthesize the diruthenium(II) complex {(μ-L)[Ru(terpy)]2}(PF6)2. Its electrochem. and spectroelectrochem. (UV-visible-NIR, EPR) study reveals a mixed-valent (RuIIIRuII) intermediate with electrochem. and spectroscopic characteristics related to those of the {(μ-adc-R)[Ru(bpy)2]2}3+ ions (adc-R2-= bis-bidentate C-substituted diacylhydrazido(2-) ligands): comproportionation const. Kc = 109.0 (CH2Cl2), intervalence charge transfer band at 1000 nm (\textgreek{e}=3800 M-1 cm-1), EPR signal at g$\bot$ = 2.14, g‖ = 1.953. The noninnocent nature of Ln- is inferred from comparative anal. of the spectroscopic data. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Knoedler, Axel and Fiedler, Jan and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/28822ffddb6e052a5c6a85cc3d3194800/b_schwederski},
doi = {10.1016/j.poly.2003.11.043},
interhash = {ef59ebc362aa61d8eb826e02d18bb497},
intrahash = {8822ffddb6e052a5c6a85cc3d3194800},
issn = {0277-5387},
journal = {Polyhedron},
keywords = {complex complex;ESR complex;ruthenium dinuclear electrochem picolinoylhydrazido prepn redn ruthenium terpyridine},
number = 4,
pages = {701--707},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {Characterization of the mixed-valent intermediate (n = 3) of the complex series {(μ,η3:η3-L)[Ru(terpy)]2}n+ with the unsaturated bridging ligand N,N'-bis(\textgreek{a}-picolinoyl)hydrazido(2-) = L2-},
volume = 23,
year = 2004
}