Kinetic studies of the acid hydrolysis of aquaoxo[N-(2-pyridylmethyl)iminodiacetato]vanadium(IV) and aqua(nitrilotriacetato)oxovanadate(IV) in aqueous perchloric acid solution.
スポンサーリンク
概要
- 論文の詳細を見る
Acid hydrolysis of aquaoxo[<I>N</I>-(2-pyridylmethyl)iminodiacetato]vandium(IV) [VO(pmida)H<SUB>2</SUB>O], ([H<SUP>+</SUP>]=0.1–2.0 M, 1M=1 mol dm<SUP>−3</SUP>) and aqua(nitrilotriacetato)oxovanadate(IV) [VO(nta)H<SUB>2</SUB>O]<SUP>−</SUP>, ([H<SUP>+</SUP>]=0.2–2.0 M) has been studied by the stopped-flow method in aqueous perchloric acid solution at an ionic strength 2.0 (LiClO<SUB>4</SUB>). The pseudo first-order rate constant <I>k</I><SUB>o</SUB> is dependent on the proton concentration. The rate formula is expressed by <I>k</I><SUB>o</SUB>=(<I>k</I><SUB>1</SUB><I>K</I><SUB>1</SUB>[H<SUP>+</SUP>]+<I>k</I><SUB>2</SUB><I>K</I><SUB>1</SUB><I>K</I><SUB>2</SUB>[H<SUP>+</SUP>]<SUP>2</SUP>)⁄(1+<I>K</I><SUB>1</SUB>[H<SUP>+</SUP>]+<I>K</I><SUB>1</SUB><I>K</I><SUB>2</SUB>[H<SUP>+</SUP>]<SUP>2</SUP>). A simulation curve fitting treatment gave the figures: <I>k</I><SUB>1</SUB>=0.02 and 0 s<SUP>−1</SUP>, <I>k</I><SUB>2</SUB>=6 and 3000 s<SUP>−1</SUP>, <I>K</I><SUB>1</SUB>=1.5 and 0.2 M<SUP>−1</SUP>, and <I>K</I><SUB>2</SUB>=0.2 and 0.004 M<SUP>−1</SUP> at 25 °C for [VO(pmida)H<SUB>2</SUB>O] and [VO(nta)H<SUB>2</SUB>O]<SUP>−</SUP>, respectively. These data indicate that the rate determining step corresponds to the dissociation of the second basal bond of the singly or doubly protonated oxovanadium(IV) complexes.
- 公益社団法人 日本化学会の論文
著者
-
Nishizawa Masato
Chemistry Department, Faculty of Science, Tohoku University
-
Saito Kazuo
Chemistry Department, Faculty of Science, Tohoku University
関連論文
- Preparation and properties of the uni- and binuclear [Co(III)N2O4] type complexes containing (S)-2-amino-1-propanol.
- Synthesis and structure of a hexa-coordinated vanadium(IV) complex aquaoxo[N-(2-pyridylmethyl)iminodiacetato]vanadium(IV) dihydrate.
- Kinetic studies of the acid hydrolysis of aquaoxo[N-(2-pyridylmethyl)iminodiacetato]vanadium(IV) and aqua(nitrilotriacetato)oxovanadate(IV) in aqueous perchloric acid solution.
- A kinetic study of the ligand exchange between bis(acetylacetonato)oxovanadium(IV) and acetylacetone[14C] in organic solvents.
- Isotopic Exchange Kinetics between Trisacetylacetonatocobalt(III) and Acetylacetone-14C in Organic Solvents
- Ligand isotopic exchange of tris(acetylacetonato)germanium(IV) perchlorate in organic solvents.
- Preparation, optical resolution, racemization, and ligand isotopic exchange of tris(1,3-diphenyl-1,3-propanedionato)-germanium(IV) perchlorate in acetonitrile.
- Asymmetric induction on the reaction of prochiral olefins with chloro-L-aminocarboxylato-.ETA.2-ethyleneplatinum(II).
- Kinetics and mechanism of ligand exchange of tris(acetylacetonato)iron(III) in acetylacetone.
- A relationship between the circular dichroism and the configuration of asymmetric nitrogen in trans(N,ethylene)-chloro-L-aminocarboxylato-.ETA.2-ethyleneplatinum(II).
- Kinetics and Steric Course of the Substitution of Various Olefins for the Asymmetric Olefin in trans(N,olefin)-Chloro-L-prolinato-trans-2-buteneplatinum(II)
- Kinetics of ligand exchange between tris(acetylacetonato[2-14C])cobalt(III) and acetylacetone in acetonitrile. Evidence for SN1 mechanism.
- Ligand isotopic exchange kinetics of tris(acetylacetonato)-titanium(IV) perchlorate in acetonitrile.
- Kinetic studies of the inversion of .ETA.2-trans-2-butene in platinum(II) complexes containing various amino carboxylates.
- Kinetics and Mechanism of Aquation and Anation of Some Amino Acid Pentamminecobalt(III) Complexes in Acid Aqueous Solutions