Revelation of varying bonding motif of alloxazine, a flavin analogue, in selected ruthenium(II/III) frameworks

Inorganic Chemistry
Prasenjit MondalGoutam Kumar Lahiri

Abstract

The reaction of alloxazine (L) and Ru(II)(acac)2(CH3CN)2 (acac(-) = acetylacetonate) in refluxing methanol leads to the simultaneous formation of Ru(II)(acac)2(L) (1 = bluish-green) and Ru(III)(acac)2(L(-)) (2 = red) encompassing a usual neutral α-iminoketo chelating form of L and an unprecedented monodeprotonated α-iminoenolato chelating form of L(-), respectively. The crystal structure of 2 establishes that N5,O4(-) donors of L(-) result in a nearly planar five-membered chelate with the {Ru(III)(acac)2(+)} metal fragment. The packing diagram of 2 further reveals its hydrogen-bonded dimeric form as well as π-π interactions between the nearly planar tricyclic rings of coordinated alloxazine ligands in nearby molecules. The paramagnetic 2 and one-electron-oxidized 1(+) display ruthenium(III)-based anisotropic axial EPR in CH3CN at 77 K with ⟨g⟩/Δg of 2.136/0.488 and 2.084/0.364, respectively (⟨g⟩ = {1/3(g1(2) + g2(2) + g3(2))}(1/2) and Δg = g1 - g3). The multiple electron-transfer processes of 1 and 2 in CH3CN have been analyzed by DFT-calculated MO compositions and Mulliken spin density distributions at the paramagnetic states, which suggest successive two-electron uptake by the π-system of the heterocyclic ring of L (L → L(•-)...Continue Reading

References

Mar 1, 2000·Trends in Biochemical Sciences·M W Fraaije, A Mattevi
Mar 28, 1996·Chemical Reviews·Neil G. Connelly, William E. Geiger
Apr 1, 2003·Journal of Computational Chemistry·Maurizio CossiVincenzo Barone
Sep 13, 2007·Journal of Computational Chemistry·Noel M O'BoyleKarol M Langner
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Jan 15, 2008·Journal of the American Chemical Society·Soushi MiyazakiShunichi Fukuzumi
Dec 5, 2008·Journal of the American Chemical Society·Doyel KumbhakarGoutam Kumar Lahiri
Jul 7, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Hao-Jun MoBao-Hui Ye
Mar 23, 2012·Inorganic Chemistry·Amit DasGoutam Kumar Lahiri
Sep 25, 2012·Chemistry : a European Journal·Amit DasGoutam Kumar Lahiri
Dec 14, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuji InuiTakahiko Kojima
Aug 3, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Ankita DasGoutam Kumar Lahiri
Dec 7, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Abhishek MandalGoutam Kumar Lahiri

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Citations

Feb 17, 2017·Inorganic Chemistry·Arijit Singha HazariGoutam Kumar Lahiri
Jun 27, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Ankita DasGoutam Kumar Lahiri
Jan 7, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Ankita DasGoutam Kumar Lahiri
Jun 19, 2018·Physical Chemistry Chemical Physics : PCCP·Huimin GuoBernhard Dick
Oct 30, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Sudip Kumar BeraGoutam Kumar Lahiri
May 28, 2019·Chemistry : a European Journal·Farheen Fatima KhanGoutam Kumar Lahiri
Apr 30, 2020·Angewandte Chemie·Prasenjit MondalAidan R McDonald
Aug 12, 2020·Chemistry, an Asian Journal·Sanchaita DeyGoutam Kumar Lahiri

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