3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F05%3A00022052" target="_blank" >RIV/61388955:_____/05:00022052 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR
Original language description
Crystallographically characterised 3,6-bis(2'-pyridyl)pyridazine (L) forms complexes with (acac)2Run or (bpy)2Ru2+ first via one pyridyl-N/pyridazyl-N chelate site in mononuclear RuII complexes (acac)2Ru(L), 1, and [(bpy)2Ru(L)](ClO4)2, 3(ClO4)2. Coordination of a second metal complex fragment is accompanied by deprotonation at the pyridazyl-C4 carbon to yield cyclometallated, asymmetrically bridged dinuclear complexes [(acac)2RuIII(.mu.-L-H.+)RuIII(acac)2](ClO4), 2(ClO4), and [(bpy)2RuII(.mu.-L-H+)RuII(bpy)2](ClO4)3, 4(ClO4)3. The very different co-ligand characteristics of mainly .sigma. donating acac- and .pi. accepting bpy are responsible for very different redox potentials and thus for the isolation of the diruthenium(III) form 2(ClO4) with antiferromagnetically coupled RuIII centers (J = -11.5 cm-1) and of the luminescent diruthenium(II) species 4(ClO4)3.
Czech name
3,6-Bis(2'-pyridyl)pyridazine (L) a jeho deprotonovaná forma (L-H+)- jako ligandy pro (acac)2Run+ nebo (bpy)2Rum+: Studium smíšené valence v [{(acac)2Ru}2(.mu.-L-H+)] a [{(bpy)2Ru}2 (.mu.-L-H+)]4+ s použitím spectroelectrochemiey a EPR
Czech description
Krystalograficky charakterizovaný 3,6-bis(2'-pyridyl)pyridazine (L ) tvoří komplexy s (acac)2Run nebo (bpy)2Ru2+ nejprve prostřednictvím jednoho pyridyl-N/pyridazyl-N chelátu v jednojaderných RuII komplexech (acac)2Ru(L), 1, a [(bpy)2Ru(L)](ClO4)2, 3(ClO4)2. Koordinace druhého fragmentu komplexu kovu je doprovázena deprotonizací na pyridazyl-C4 uhlíku za vzniku cyklometalických asymetricky přemostěných dvojjaderných komplexů [(acac)2RuIII(.mu.-L-H+) RuIII(acac)2](ClO4), 2(ClO4), a [(bpy)2RuII(.mu.-L-H+)RuII(bpy)2] (ClO4)3, 4(ClO4)3. Velmi odlišné charakteristiky koligandů, .sigma. donorového acac- a .pi. akceptorového bpy, jsou zodpovědné za velmi odlišné redox potentiály a následně za izolaci diruthenium(III) formy 2(ClO4) s antiferomagneticky spojenými RuIII centry (J = -11.5 cm-1) a luminiscenční diruthenium(II) částice 4(ClO4)3.
Classification
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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Result continuities
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)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Dalton Transactions: an international journal of inorganic chemistry
ISSN
1477-9226
e-ISSN
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Volume of the periodical
-
Issue of the periodical within the volume
4
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
706-712
UT code for WoS article
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EID of the result in the Scopus database
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