Magnetic property and crystal structure of bis [N-(4-chlorophenyl) salicylideneaminato] oxovanadium (IV)

Matsuoka, Naoki; Kawamura, Hiroshi; Yoshioka, Naoki

doi:10.1016/j.cplett.2010.01.057

Cited by 11 publications

(8 citation statements)

References 43 publications

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“…The V-O bond lengths of 1.888(4) and 1.929(4) Å and the V-N bond lengths of 2.062(5) and 2.058(5) Å are similar to those given in related Schiff base oxovanadium complexes [64][65][66][67]. The V-O bond distances are shorter than V-N, which indicates stronger coordination of the oxygen atoms.…”

Section: X-ray Crystal Structuresupporting

confidence: 72%

Mononuclear oxovanadium(IV) Schiff base complex: Synthesis, spectroscopy, electrochemistry, DFT calculation and catalytic activity

Dekar

Ouari

Bendia

et al. 2018

Journal of Organometallic Chemistry

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Section: X-ray Crystal Structuresupporting

confidence: 72%

Mononuclear oxovanadium(IV) Schiff base complex: Synthesis, spectroscopy, electrochemistry, DFT calculation and catalytic activity

Dekar

Ouari

Bendia

et al. 2018

Journal of Organometallic Chemistry

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“…As the oxovanadium oxygen is involved in this contact, it is no longer “available” for halogen bonding, and the halogen bond is achieved through acac oxygen atoms, leading to a 2D structure interconnected by orthogonal V–O and bifurcated I···O 2 halogen bonds (Figure b). It is interesting to note that, although binding of Lewis bases (e.g., pyridine derivatives) to vanadium in oxovanadium(IV) diketonates is commonplace, − there are only a handful of reported structures where an oxovanadium oxygen bridges to another vanadium atom in oxovanadium(IV) complexes to form coordination polymers. − …”

Section: Resultsmentioning

confidence: 99%

Bifurcated and Monocentric Halogen Bonds in Cocrystals of Metal(II) Acetylacetonates with p-Dihalotetrafluorobenzenes

Stilinović

Grgurić

Piteša

et al. 2018

Crystal Growth & Design

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In order to test metal diketonates as potential acceptors of bifurcated halogen bonds, the series of acetylacetonates (acac) of divalent cations Cu(acac)2 (1), Pd(acac)2 (2), VO(acac)2 (3), Ni(acac)2(H2O)2 (4), Co(acac)2(H2O)2 (5), and Zn (acac)2(H2O) (6) were cocrystallized with 1,4-diiodotetrafluorobenzene (tfib) and 1,4-dibromotetrafluorobenzene (tfbb) as halogen donors. This has yielded a series of 10 cocrystals, tfib having formed cocrystals with all six acceptors and tfbb with all except for 4 and 5. In eight cocrystals a pair of acac oxygen atoms acts as a bifurcated halogen bond acceptor, the bond being symmetric in cocrystals of 1 and 2 and asymmetric in cocrystals of 3 and 6. The only cocrystals in which a halogen bond was formed with alternative acceptor sites were cocrystals of tfib with 4 and 5, where coordinated water molecules form hydrogen bonds with all available acac oxygen atoms, leaving only the water molecules themselves as halogen bond acceptors. The favorability of the bifurcated halogen bond was also confirmed by QM computations, which have shown the bifurcated bonds to be the most favorable interactions in vacuo, with bond energies in the range of 29–37 kJ mol–1 for tfib and 20–25 kJ mol–1 for tfbb. This also reflects on the thermal stability of the cocrystals of 1–3 (which do not contain coordinated water) with tfib, which melt/decompose between ca. 180 and 220 °C.

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“…A ferromagnetic intermolecular interaction between the molecules in the chains of polymeric oxidovanadium(IV) complexes with tetradentate Schiff base ligands have been found [39]. The IR spectra of the complexes 1-4a show a strong V = O stretching band around 880-890 cm −1 which is typical for linear chain V = O…V = O polymeric structures [34][35][36][37][38][39] This band is significantly blue-shifted in the IR spectra of monomeric oxidovanadium complexes [63][64][65][66]. A ferromagnetic intermolecular interaction between the molecules in the chains of polymeric oxidovanadium(IV) complexes with tetradentate Schiff base ligands have been found [39].…”

Section: Synthesis and Characterization Of Compounds 1-4amentioning

confidence: 93%

“…}), where vanadium is coordinated by a terminal oxygen atom (V = O) of an adjacent molecule to complete the octahedral geometry, are much less common. Most of them belong to oxidovanadium(IV) complexes with tetradentate Schiff base ligands [33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

New Oxidovanadium(IV) Complexes with 2,2′-bipyridine and 1,10-phenathroline Ligands: Synthesis, Structure and High Catalytic Activity in Oxidations of Alkanes and Alcohols with Peroxides

et al. 2019

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Reactions of [VCl3(thf)3] or VBr3 with 2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen) in a 1:1 molar ratio in air under solventothermal conditions has afforded polymeric oxidovanadium(IV) four complexes 1–4 of a general formula [VO(L)X2]n (L = bpy, phen and X = Cl, Br). Monomeric complex [VO(DMF)(phen)Br2] (4a) has been obtained by the treatment of compound 4 with DMF. The complexes were characterized by IR spectroscopy and elemental analysis. The crystal structures of 3 and 4a were determined by an X-ray diffraction (XRD) analysis. The {VOBr2(bpy)} fragments in 3 form infinite chains due to the V = O…V interactions. The vanadium atom has a distorted octahedral coordination environment. Complexes 1–4 have been tested as catalysts in the homogeneous oxidation of alkanes (to produce corresponding alkyl hydroperoxides which can be easily reduced to alcohols by PPh3) and alcohols (to corresponding ketones) with H2O2 or tert-butyl hydroperoxide in MeCN. Compound 1 exhibited the highest activity. The mechanism of alkane oxidation was established using experimental selectivity and kinetic data and theoretical DFT calculations. The mechanism is of the Fenton type involving the generation of HO• radicals.

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Magnetic property and crystal structure of bis [N-(4-chlorophenyl) salicylideneaminato] oxovanadium (IV)

Cited by 11 publications

References 43 publications

Mononuclear oxovanadium(IV) Schiff base complex: Synthesis, spectroscopy, electrochemistry, DFT calculation and catalytic activity

Mononuclear oxovanadium(IV) Schiff base complex: Synthesis, spectroscopy, electrochemistry, DFT calculation and catalytic activity

Bifurcated and Monocentric Halogen Bonds in Cocrystals of Metal(II) Acetylacetonates with p-Dihalotetrafluorobenzenes

New Oxidovanadium(IV) Complexes with 2,2′-bipyridine and 1,10-phenathroline Ligands: Synthesis, Structure and High Catalytic Activity in Oxidations of Alkanes and Alcohols with Peroxides

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