The pK/sub a/ of pyraziniumpentacyanoruthenate(II), (Cn)/sub 5/Ru(pzH)/sup 2 -/
Journal Article
·
· Inorg. Chem.; (United States)
The synthesis and characterization of (CN)/sub 5/Ru(pz)/sup 3 -/ (pz = pyrazine) and its N-methylated derivative, (CN)/sub 5/Ru(pzCH/sub 3/)/sup 2 -/, are described. The proton NMR spectra of pz or pzCH/sub 3//sup +/ coordinated to (NH/sub 3/)/sub 5/Ru/sup 2 +/, (CN)/sub 5/Ru/sup 3 -/, (CN)/sub 5/Fe/sup 3 -/, and (CN)/sub 5/Co/sup 2 -/ are discussed. The effective pK/sub a/'s of (CN)/sub 5/Ru(pzH)/sup 2 -/ and (CN)/sub 5/Fe(pzH)/sup 2 -/ have been measured by spectrophotometric titration as 0.4 +/- 0.1 and 0.065 +/- 0.06 in contrast with 2.85 +/- 0.1 for (NH/sub 3/)/sub 5/Ru(pzH)/sup 3 +/. The influence of CN/sup -/ on ..pi.. back-bonding as compared to that of NH/sub 3/ is discussed for complexes of the Fe(II), Ru(II), and Os(II) triad.
- Research Organization:
- Univ. of Pittsburgh, PA
- OSTI ID:
- 5359503
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 22:7; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Fri May 01 00:00:00 EDT 1981
· Inorg. Chem.; (United States)
·
OSTI ID:6400021
Solvent dependences of spectral and redox properties of pyrazine (pz) complexes of ruthenium and osmium pentaammines: Ru(NH/sub 3/)/sub 5/pzCH/sub 3//sup 3 +/, Os(NH/sub 3/)/sub 5/pzCH/sub 3//sup 3 +/, and (Ru(NH/sub 3/)/sub 5/)/sup 2/pz/sup 5 +/
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Wed Sep 09 00:00:00 EDT 1987
· Inorg. Chem.; (United States)
·
OSTI ID:6091340
Assessment of the. pi. -acceptor capability of selected ligands based on the photoelectron spectra of ruthenium ammine complexes
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMMONIA
AZINES
CHEMICAL BONDS
CHEMICAL REACTIONS
COMPLEXES
CYANIDES
EQUILIBRIUM
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
MAGNETIC RESONANCE
METHYLATION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM COMPOUNDS
PYRAZINES
RESONANCE
RUTHENIUM COMPLEXES
RUTHENIUM COMPOUNDS
SPECTROPHOTOMETRY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400201* -- Chemical & Physicochemical Properties
AMMONIA
AZINES
CHEMICAL BONDS
CHEMICAL REACTIONS
COMPLEXES
CYANIDES
EQUILIBRIUM
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
MAGNETIC RESONANCE
METHYLATION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM COMPOUNDS
PYRAZINES
RESONANCE
RUTHENIUM COMPLEXES
RUTHENIUM COMPOUNDS
SPECTROPHOTOMETRY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS