Mixed-valency with cyanides as terminal ligands: Diruthenium(III,II) complexes with the 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine bridge and variable co-ligands (CN- vs. bpy or NH3)

Vergara, M. M.; García Posse, M. E.; Fagalde, F.; Katz, N. E.; Fiedler, Jan; Sarkar, B.; Sieger, M.; Kaim, W.

doi:https://dx.doi.org/10.1016/j.ica.2009.09.018

Number of the records: 1

Mixed-valency with cyanides as terminal ligands: Diruthenium(III,II) complexes with the 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine bridge and variable co-ligands (CN- vs. bpy or NH3)

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SYSNO ASEP	0341711
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Mixed-valency with cyanides as terminal ligands: Diruthenium(III,II) complexes with the 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine bridge and variable co-ligands (CN- vs. bpy or NH3)
Author(s)	Vergara, M. M. (AR) García Posse, M. E. (AR) Fagalde, F. (AR) Katz, N. E. (AR) Fiedler, Jan (UFCH-W)_{RID, ORCID} Sarkar, B. (DE) Sieger, M. (DE) Kaim, W. (DE)
Source Title	Inorganica chimica acta. - : Elsevier - ISSN 0020-1693 Roč. 363, č. 1 (2010), s. 163-167
Number of pages	5 s.
Language	eng - English
Country	NL - Netherlands
Keywords	cyano ligands ; mixed-valency ; Ruthenium complexes
Subject RIV	CG - Electrochemistry
R&D Projects	OC 140 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	OC09043 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000272205800021
DOI	10.1016/j.ica.2009.09.018
Annotation	New diruthenium complexes (PPN)(4)[(NC)(4)Ru(mu-bptz)Ru(CN)(4)], (PPN)(4) 1, and [(bpy)(2)Ru(mu-bptz)Ru(CN)(4)], 2, (PPN+ = bis(triphenylphospine)iminium; bptz = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine; bpy = 2,2'-bipyridine), were synthesised and characterised by spectroscopic and electrochemical techniques. The comproportionation constant K-c = 10(7.0) of the mixed-valent species [(NC)(4)Ru(mu-bptz)Ru(CN)(4)](3) as obtained by oxidation of 1(4) in CH3CN is much lower than the K-c = 10(15.0) previously detected for [(H3N)(4)Ru(bptz)-Ru(NH3)(4)](5+), reflecting the competition between CN and bptz for the p-electron density of the metals. Comparison with several other bptz-bridged diruthenium(II, III)complexes reveals an approximate correlation between K-c and the diminishing effective pi acceptor capacity of the ancillary terminal ligands.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2011

Number of the records: 1