New titanium(IV) and vanadium(IV) haloalkoxides: synthetic route and structural characterisation

Nunes, Giovana G.; Reis, Dayane M.; Camargo, Pedro Henrique Cury de; Hitchcock, Peter B.; Hörner, Manfredo; Matos, Robson M.; Mangrich, Antônio S.; Sá, Eduardo L. de; Leigh, G.J.; Soares, Jaı́sa F.

doi:10.1590/s0103-50532003000600009

Cited by 5 publications

(3 citation statements)

References 16 publications

(22 reference statements)

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“…While a number of TiCl x OR 4− x compounds have been structurally characterized, only a hand-full of systems have produced non-solvated species, including [Cl 2 (OR)Ti(μ-OR)] 2 where OR = OEt, OC 6 H 5 , OC 6 H 4 (Bu t )-4, and some bidentate ligands (propane-1,3-diolalto and 3,3′-dimethyl-1,1′-bi-2-naphtholato). Some simple HOR solvated compounds have also been isolated such as, [(HOR)Cl 2 (OR)Ti(μ-OR)] 2 where OR = OPr i27 , OCH 2 CH 2 Cl,[(HOPr i )Cl 2 (OPr i )Ti(μ-Cl)] 2 27 , [(HOPr i )Cl 2 (OPr i )Ti(μ-OPr i )] 2 27 , and [(HOPr i )Cl(OPr i ) 2 Ti(μ-OPr i )] 2 . In general, the metrical data (Table ) are in agreement for 1 and 4 and with literature − model compounds.…”

Section: Resultsmentioning

confidence: 99%

“…Some simple HOR solvated compounds have also been isolated such as, [(HOR)Cl 2 (OR)Ti(μ-OR)] 2 where OR = OPr i27 , OCH 2 CH 2 Cl,[(HOPr i )Cl 2 (OPr i )Ti(μ-Cl)] 2 27 , [(HOPr i )Cl 2 (OPr i )Ti(μ-OPr i )] 2 27 , and [(HOPr i )Cl(OPr i ) 2 Ti(μ-OPr i )] 2 . In general, the metrical data (Table ) are in agreement for 1 and 4 and with literature − model compounds. For 1 and 4 , two types (bridging and terminal) of OPr i are expected if the solid state structures were retained in solution; however, the 1 H NMR in tol- d 8 of the crystals of 1 and 4 revealed a single set of OPr i resonances.…”

Section: Resultsmentioning

confidence: 99%

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Stepwise Modification of Titanium Alkoxy Chloride Compounds by Pyridine Carbinol

Boyle¹,

Ottley²,

Rodriguez³

et al. 2008

Inorg. Chem.

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The stepwise modifications of stoichiometric mixtures of titanium chloride (TiCl 4) and titanium iso-propoxide (Ti(OPr (i)) 4) by 2-pyridine methanol (H-OPy) led to the isolation of a systematically varied, novel family of compounds. The 3:1 reaction mixture of Ti(OPr (i)) 4:TiCl 4 yielded [Cl(OPr (i)) 2Ti(mu-OPr (i))] 2 ( 1). Modification of 1 with 1 and 2 equiv of H-OPy produced [Cl(OPr (i)) 2Ti(mu c-OPy)] 2 ( 2, where mu c = chelating bridge) and "(OPy) 2TiCl(OPr (i))" ( 3, not crystallographically characterized), respectively. Altering the Ti(OPr (i)) 4 to TiCl 4 stoichiometry to 1:1 led to isolation and identification of another dimeric species [Cl 2(OPr (i))Ti(mu-OPr (i))] 2 ( 4). Upon modification with 1 equiv of H-OPy, [Cl 2(OPr (i))Ti(mu c-OPy)] 2 ( 5) was isolated from toluene and (OPy)TiCl 2(OPr (i))(py) ( 6) from py. An additional equivalent of H-OPy led to the monomeric species (OPy) 2TiCl 2 ( 7). Because of the low solubility and similarity in constructs of these compounds, additional analytical data, such as the beryllium dome or BeD-XRD powder analyses, were used to verify the bulk samples, which were found to be in agreement with the single crystal structures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Stepwise Modification of Titanium Alkoxy Chloride Compounds by Pyridine Carbinol

Boyle¹,

Ottley²,

Rodriguez³

et al. 2008

Inorg. Chem.

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“…39 The butoxide-vanadium distances are in accordance with other reported values for this type of bond. 40 The length of the C O bond of the carboxylic acids of the free ligands increased upon complexation. On the contrary, the C-O(-H) bond suffered a decrease when it is coordinated to the vanadium center.…”

Section: Theoretical Studiesmentioning

confidence: 99%

Synthesis, characterization and biological properties of vanadyl(IV) complexes of diclofenac and indomethacin: an experimental and theoretical study

Williams

Molinuevo

Okulik³

et al. 2005

Applied Organom Chemis

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Two new vanadyl(IV) complexes with the non-steroidal antiinflammatory drugs Indomethacin andDiclofenac were synthesized and characterized by elemental analysis, electronic, diffuse reflectance and FTIR spectroscopies and thermal behavior. The structures of the oxo-vanadium(IV) complexes were obtained by carrying out ab initio calculations (B3LY/3-21G * * ) owing to the difficulties of obtaining single crystals of good quality for X-ray studies. Indomethacin and Diclofenac did not cause any effect when tested on cellular proliferation in two osteoblast-cell lines in culture (MC3T3E1 and UMR106). The biological effect of the complexes depends on the cellular type and on the nature of the coordinated ligands.

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Reactions of chlorotitanium tri-iso-propoxide with methanol and tributylamine

Fric

Schubert

2008

J Sol-Gel Sci Technol

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New titanium(IV) and vanadium(IV) haloalkoxides: synthetic route and structural characterisation

Cited by 5 publications

References 16 publications

Stepwise Modification of Titanium Alkoxy Chloride Compounds by Pyridine Carbinol

Stepwise Modification of Titanium Alkoxy Chloride Compounds by Pyridine Carbinol

Synthesis, characterization and biological properties of vanadyl(IV) complexes of diclofenac and indomethacin: an experimental and theoretical study

Reactions of chlorotitanium tri-iso-propoxide with methanol and tributylamine

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