Complexes of vanadium(III) with pentadentate ligands

McNeese, Timothy J.; Mueller, T.

doi:10.1021/ic00213a022

Cited by 6 publications

(2 citation statements)

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“…The alternative procedure employed in this and our previous study, which utilizes only 1 equiv of acid, excess H 2 , and a large area platinum gauze (on which H 2 is dissociatively adsorbed), was found to be general and efficient. It has the advantage that the V III (SB) + is produced without extraneous axial ligands that could interfere in reactivity studies. − …”

Section: Discussionmentioning

confidence: 99%

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O₂ to H₂O in Acetonitrile

Liu

Anson

2001

Inorg. Chem.

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Fifteen Schiff base ligands were synthesized and used to form complexes with vanadium in oxidation states III, IV, and V. Electrochemical and spectral characteristics of the complexes were evaluated and compared. In acidified solutions in acetonitrile the vanadium(IV) complexes undergo reversible disproportionation to form V(III) and V(V) complexes. With several of the ligands the V(III) complexes are much more stable in the presence of acid than is the previously studied complex with salen, an unelaborated Schiff base ligand (H(2) salen = N,N'-ethylenebis(salicylideneamine)). Equilibrium constants for the disproportionation were evaluated. The vanadium(III) complexes reduce dioxygen to form two oxo ligands. The reaction is stoichiometric in the absence of acid, and second-order rate constants were evaluated. In the presence of acid some of the complexes investigated participate in a catalytic electroreduction of dioxygen.

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Section: Discussionmentioning

confidence: 99%

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O₂ to H₂O in Acetonitrile

Liu

Anson

2001

Inorg. Chem.

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“…The silica gel was from Sorbent Technologies (60 Å, 32−63 μm). N -trifluoroacetyl-6-aminocaproic acid, 4-cyanobenzoyl chloride, and 4-(trifluoroacetylaminomethyl)-benzoic acid were prepared according to published methods.…”

Section: Methodsmentioning

confidence: 99%

Organic Syntheses on an Icosahedral Borane Surface: Closomer Structures with Twelvefold Functionality

Jalisatgi

Bayer

et al. 2005

J. Am. Chem. Soc.

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The syntheses of a series of novel ester-linked derivatives of the icosahedral [closo-B12(OH)12]2- boron cluster (closomer esters) are described using several synthetic methods. The reaction of bis(tetrabutylammonium)-closo-dodecahydroxy-dodecaborate, [NBu 4 ] 2 1, with carboxylic acid chlorides and anhydrides, vinyl esters with a Y5(OiPr)13O catalyst and 1,1‘-carbonyldiimidazole-activated carboxylic acids yields the corresponding dianionic dodeca-ester closomers. The method using 1,1‘-carbonyldiimidazole-activated carboxylic acids may be employed as a general synthetic strategy. The use of elevated reaction temperatures, achievable under pressure, to expedite syntheses is described. An attractive methodology using immobilized scavenger reagents for the expeditious purification of the closomer esters was employed. The developed methodology is compatible with a variety of peripheral functional groups attached to the termini of densely packed, carboxylate ester-linked radial arms bonded to the icosahedral borane surface. A closomer ester having twelve terminal amino groups was prepared, and without isolation, fully acetylated in good yield.

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ChemInform Abstract: COMPLEXES OF VANADIUM(III) WITH PENTADENTATE LIGANDS

McNeese¹,

Mueller²

1985

Chemischer Informationsdienst

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Complexes of vanadium(III) with pentadentate ligands

Cited by 6 publications

References 6 publications

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O₂ to H₂O in Acetonitrile

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O₂ to H₂O in Acetonitrile

Organic Syntheses on an Icosahedral Borane Surface: Closomer Structures with Twelvefold Functionality

ChemInform Abstract: COMPLEXES OF VANADIUM(III) WITH PENTADENTATE LIGANDS

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Complexes of vanadium(III) with pentadentate ligands

Cited by 6 publications

References 6 publications

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O2 to H2O in Acetonitrile

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O2 to H2O in Acetonitrile

Organic Syntheses on an Icosahedral Borane Surface: Closomer Structures with Twelvefold Functionality

ChemInform Abstract: COMPLEXES OF VANADIUM(III) WITH PENTADENTATE LIGANDS

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Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O₂ to H₂O in Acetonitrile

Schiff Base Complexes of Vanadium(III, IV, V) as Catalysts for the Electroreduction of O₂ to H₂O in Acetonitrile