Ligand isotopic exchange of tris(acetylacetonato)germanium(IV) perchlorate in organic solvents.
スポンサーリンク
概要
- 論文の詳細を見る
The ligand isotopic exchange between tris(acetylacetonato)germanium(IV) perchlorate and acetylacetone[<SUP>14</SUP><I>C</I>] has been studied in 1,1,2,2-tetrachloroethane (TCE), nitromethane (NM), and acetonitrile (AN), at 100–120°C. In these solvents, the rate formula was <I>R</I>=<I>k</I>[H<SUB>2</SUB>O][complex]; the concentrations of the complex, free ligand, and water in solution were in the ranges from 0.01 to 0.1 mol dm<SUP>−3</SUP>. The activation enthalpies and entropies for the <I>k</I>'s are 105, 98, and 90 kJ mol<SUP>−1</SUP>; and −25, −53, and −69 J K<SUP>−1</SUP> mol<SUP>−1</SUP>, in TCE, NM, and AN, respectively. Influence of acid and base concentrations, and deuterium isotope effect on the rate in AN suggest that the rate controlling step of the exchange is governed by the ease of the proton transfer between the leaving and the incoming acac<SUP>−</SUP> in an intermediate.
- 公益社団法人 日本化学会の論文
著者
-
Saito Kazuo
Chemistry Department, Faculty of Science, Tohoku University
-
Nagasawa Akira
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