Synthesis and Mixed Valence Aspects of [{(L)ClRu}(2)(mu-tppz)](n+) Incorporating 2, 2 ''-dipyridylamine (L) as Ancillary and 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) as Bridging Ligand.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F03%3A54030222" target="_blank" >RIV/61388955:_____/03:54030222 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Synthesis and Mixed Valence Aspects of [{(L)ClRu}(2)(mu-tppz)](n+) Incorporating 2, 2 ''-dipyridylamine (L) as Ancillary and 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) as Bridging Ligand.
Original language description
-The tppz-bridged diruthenium complex [{(L)ClRuII}(2)(mu-tppz)](ClO4)(2), [1](ClO4), {tppz=2,3,5,6-tetrakis(2-pyridyl)-pyrazine, L=2,2''-dipyridylamine} and its mononuclear counterpart [(L)ClRuII(tppz)]ClO4, [2](ClO4) have been synthesized. The 380 mV separation between successive Ru-II/Ru-III couples in [1](2+) leads to a comproportionation constant (K-c) of 2.7x10(6). Consequently, the (RuRuIII)-Ru-II species [1](3+) exhibits a rather narrow intervalence charge transfer band at 1700 run, suggesting aclass III mixed-valence state, the electronic coupling constant (V-ab) is calculated at 2940 cm(-1). Complex [1](3+) displays a rhombic EPR spectrum at 4 K (g(1)=3.390, g(2)=2.278, g(3)=1.697), characteristic of ruthenium(III) in a distorted octahedral environment. Both complexes show two successive tppz-based reduction processes [(tppz)(0/-1) and (tppz)(-1/-2)].
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CG - Electrochemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2003
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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