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Bidirectional non-innocence of the beta-diketonato ligand 9-oxidophenalenone (L-) in [Ru([9]aneS3)-(L)(dmso)](n), [9]aneS3=1,4,7-trithiacyclononane

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Title Bidirectional non-innocence of the beta-diketonato ligand 9-oxidophenalenone (L-) in [Ru([9]aneS3)-(L)(dmso)](n), [9]aneS3=1,4,7-trithiacyclononane
 
Creator AGARWALA, H
SCHERER, TM
MOBIN, SM
KAIM, W
LAHIRI, GK
 
Subject RADICAL MOLECULAR CONDUCTORS
DENSITY-FUNCTIONAL THEORY
BOND GROUND-STATE
PHYSICAL-PROPERTIES
STRUCTURAL-CHARACTERIZATION
ELECTRONIC-STRUCTURE
SULFOXIDE COMPLEXES
EXCITATION-ENERGIES
AROMATIC DIIMINE
HALF-SANDWICH
 
Description The new compound [RuII([9] aneS3)(L)(dmso)] ClO4 ([1]ClO4) ([9]aneS3 = 1,4,7-trithiacyclononane, HL = 9-hydroxyphenalenone, dmso = dimethylsulfoxide) has been structurally characterised to reveal almost equal C-O bond distances of coordinated L-, suggesting a delocalised bonding situation of the beta-diketonato ligand. The dmso ligand is coordinated via the sulfur atom in the native (1(+)) and reduced states (1 and 1(-)) as has been revealed by X-ray crystallography and by DFT calculations. Cyclic voltammetry of 1(+) exhibits two close-lying one-electron oxidation waves at 0.77 V and 0.94 V, and two similarly close one-electron reduction processes at -1.43 V and -1.56 V versus SCE in CH2Cl2. The electronic structures of 1('') in the accessible redox states have been analysed via experiments (EPR and UV-vis-NIR spectroelectrochemistry) and by DFT/ TD-DFT calculations, revealing the potential for bidirectional non-innocent behaviour of coordinated L(-/-/-)2(-). Specifically, the studies establish significant involvement of L based frontier orbitals in both the oxidation and reduction processes: [([9]aneS3)(dmso) Ru-III-L-](3+) (1(3+)). [([9]aneS3)(dmso) Ru-III-L-](2+)/[([9] aneS3)(dmso) Ru-II-L-](2+) (1(2+)). [([9] aneS3)(dmso) Ru-II-L-](+) (1(+)). [([9]aneS3)( dmso) Ru-II-L-2-] (1). [([9] aneS3)(dmso) Ru-II-L3-](-)/[([9] aneS3)(dmso) RuI-L-2-](-)(1(-)).
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-28T12:14:42Z
2014-12-28T12:14:42Z
2014
 
Type Article
 
Identifier DALTON TRANSACTIONS, 43(10)3939-3948
1477-9226
1477-9234
http://dx.doi.org/10.1039/c3dt53069h
http://dspace.library.iitb.ac.in/jspui/handle/100/16470
 
Language English