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          Institute: MPI für bioanorganische Chemie     Collection: MPI für bioanorganische Chemie     Display Documents



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ID: 715716.0, MPI für bioanorganische Chemie / MPI für bioanorganische Chemie
Oxidovanadium Complexes of 2,2'-Bipyridine, 1,10 Phenanthroline, and p-Nitro-o-aminophenol - Radical versus Nonradical States
Authors:Shit, Madhusudan; Bera, Sachinath; Maity, Suvendu; Maji, Subrata; Weyhermüller, Thomas; Ghosh, Prasanta
Language:English
Date of Publication (YYYY-MM-DD):2016
Title of Journal:European Journal of Inorganic Chemistry
Journal Abbrev.:Eur.J.Inorg.Chem.
Issue / Number:3
Start Page:330
End Page:338
Review Status:Internal review
Audience:Experts Only
Abstract / Description:2,2'-Bipyridine (bpy), 1,10-phenanthronline (phen) and p-nitro-o-aminophenol ((LH2)-L-NO2) oxidovanadium complexes of the types [(L-ONO(2-))(VO)(bpy)] (1), [(L-ONO(2-))(VO)(phen)] (2) and [(L-ONO(2-))(VO)(L-NO2(ISQ)center dot-)][NHEt3] (3-NHEt3+; L-NO2(ISQ)center dot-= p-nitro-o-iminobenzosemiquinonate radical) were isolated with (E)-2-(3-hydroxy- 3-phenyltriaz-1-en-1-yl) benzoic acid (LONOH2) as a coligand. The single-crystal X-ray bond parameters and electron paramagnetic resonance (EPR) spectra authenticated that 1 and 2 are the oxidovanadium(IV) complexes of bpy and phen, whereas 3-is the (NO2)LISQ(center dot-) complex of oxidovanadium(IV) and undergoes reversible one-electron oxidation and reduction at lower potentials. Density functional theory (DFT) calculations established that the closed-shell-singlet (CSS) solution of 3(-) is unstable owing to open-shell-singlet (OSS) perturbation. The CSS. OSS charge-transfer transition that appears at lambda = 632 nm is absent for 1 and 2. Complex 3 is a hybrid of the [(L-ONO(2-))(VO3+)((NO2)LIQ)] ((NO2)LIQ = p-nitro-o-iminobenzoquinone) and [(L-ONO(2-))(VO3+)((NO2)LISQ(center dot-))] states, whereas 3(2)-is an oxidovanadium(IV) complex of the type [(L-ONO(2-))(VO2+)(NO2LAP 2-)] 2( (NO2)LAP(2-)= p-nitro-o-amidophenolato).
Comment of the Author/Creator:Date: 2016, JAN 2016
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für bioanorganische Chemie
External Affiliations:[Shit.M.; Bera,S.; Maity,S.; Maji,S.; Ghosh,P.]Department of Chemistry, R. K. Mission Residential College,
Narendrapur, Kolkata 700103, India.
Identifiers:ISI:000368828300004 [ID No:1]
ISSN:1434-1948 [ID No:2]
DOI:10.1002/ejic.201501246 [ID No:3]
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