Formations of mixed-valence oxovanadiumV,IV citrates and homocitrate with N-heterocycle chelated ligand

Inorganic Chemistry
Can-Yu ChenYuan L Chow

Abstract

Dimeric mixed-valence oxovanadium citrate [V 2O 3(phen) 3(Hcit)].5H 2O ( 1) (H 4cit = citric acid, phen = 1,10-phenanthroline) was isolated from a weak acidic medium. It could be converted quantitatively into a tetrameric oxovanadium citrate adduct of 1,10-phenanthroline [V 2O 3(phen) 3(Hcit) 2(phen) 3O 3V 2].12H 2O ( 2). This was supported by the trace of infrared spectra and X-ray diffraction patterns. The two compounds feature a bidentate citrate group that chelates only to one vanadium center through their negatively charged alpha-alkoxy and alpha-carboxy oxygen atoms, while the other beta-carboxy and beta-carboxylic acid groups are free to participate in strong intramolecular and intermolecular hydrogen bonding [2.45(1) in 1 and 2.487(2) A in 2], respectively. This is also the case of homocitrato vanadate(V/IV) [V 2O 3(phen) 3( R, S-H 2homocit)]Cl.6H 2O ( 3) (H 4homocit = homocitric acid), which features a binding mode similar to that found in the R-homocitrato iron molybdenum cofactor of Mo-nitrogenase. Moreover, the homocitrato vanadate(V) [VO 2(phen) 2] 2[V 2O 4( R,S-H 2homocit) 2].4H 2O.2C 2H 5OH ( 4) is isolated as a molecular precursor for the formation of mixed-valence complex 3. The V-O alpha-alkoxy and V-O alpha-c...Continue Reading

References

Apr 10, 2002·Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry·Dieter RehderDongren Wang
Feb 6, 2003·Journal of the American Chemical Society·Berit Hinnemann, Jens K Nørskov
Feb 11, 2004·Biochemistry·Lance C SeefeldtDennis R Dean
Sep 27, 2006·Inorganic Chemistry·Zhao-Hui ZhouYuan L Chow
Nov 8, 2006·Proceedings of the National Academy of Sciences of the United States of America·James B Howard, Douglas C Rees

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Citations

Oct 27, 2012·Inorganic Chemistry·Manas SutradharArmando J L Pombeiro
Aug 20, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Lan Deng, Zhao-Hui Zhou
Sep 22, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Nadia MarinoRobert P Doyle
Jul 6, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Lubin NiGuowang Diao
Nov 26, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Mao-Long ChenZhao-Hui Zhou
Dec 15, 2020·Inorganic Chemistry·Li HuangDou Wen
Oct 9, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Li HuangDou Wen

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