The solution chemistry of organotin compounds. I. A 1H NMR study of the complex formation between methyltin trichloride and 4-substituted pyridines.

スポンサーリンク

概要

• 論文の詳細を見る

• The formation of donor-acceptor complexes between MeSnCl<SUB>3</SUB> and 4-substituted pyridines has been investigated by analyzing the concentration dependence of NMR parameters. The formation of 1(MeSnCl<SUB>3</SUB>):2(pyridine) and 1:1 complexes has been proved, and the equilibrium constants(<I>K</I><SUB>1</SUB> and <I>K</I><SUB>2</SUB>) and complex formation shifts (<I>Δ</I><SUB>AB</SUB> and <I>Δ</I><SUB>AB2</SUB>) are determined for the successive formation of these complexes, log<I>K</I><SUB>1</SUB> and log<I>K</I><SUB>2</SUB> are in a good linear correlation with each other, and they have a tendency parallel with that of p<I>K</I><SUB>a</SUB> of the pyridine derivative, suggesting a predominant contribution of σ-bonding in the donor-acceptor bond. Both <I>Δ</I><SUB>AB</SUB> and <I>Δ</I><SUB>AB2</SUB> indicate a high-field shift on the formation of the complex, which is consistent with the expected electron transfer in the donor-acceptor bond. However, <I>Δ</I><SUB>AB</SUB> varies inversely to the basicity of the pyridines; the anisotropy effect of the pyridine ring is suggested as the reason for this. The results are also discussed in relation to Hammett's substituent constant.

• 公益社団法人 日本化学会の論文

著者

• Fujiwara Hideaki

  Faculty Of Medicine Osaka University

• SASAKI YOSHIO

  Faculty of Pharmaceutical Sciences Osaka University

• FUJIWARA Hideaki

  Faculty of Pharmaceutical Sciences, Osaka University

• Sakai Fumihiko

  Faculty of Pharmaceutical Sciences, Osaka University

• Takeyama Miyoko

  Faculty of Pharmaceutical Sciences, Osaka University

関連論文

• QSAR ANALYSIS BY MEANS OF NOVEL SUBSTITUENT ENTROPY CONSTANT σ_
• Thermochemical Aspects of Partition. A Study on The Novel Hydrophobic Parameters of Multiply-Substituted Benzoic Acids
• Metabolism of an ionic contrast medium and the related agents
• The Energy Aspects of Oil/Water Partition. Proposition of Novel Hydrophobic Parameters for the Treatment of Quantitative Structure-Activity Relationships
• Unusual Behavior of Ion Transport Mediated by Polyene Antibiotics. Activation Energies for the Exchange of Na^+ Ions through Liposomal Membranes Studied by ^Na-NMR Spectroscopy
• Structural Effects in NMR Spectroscopy of Vinylic Compound 1. Investigation of Intramolecular Specific Interactions C-H…N in Hetaryl Vinyl Ethers by ^1H, ^C, ^N, and ^O NMR Spectroscopies and Quantum-Chemical Calculations
• The solution chemistry of organotin compounds. III. A thermodynamic study of the molecular interaction of Me2SnCl2 with Lewis bases by means of nuclear magnetic resonance spectroscopy.
• Solvation effect on the complex formation between o-quinones and metal chlorides in nonaqueous media.
• Development and applications for the simulater of intermolecular potentials. II. Hydration effects on the conformation of tyramine.
• Entropy changes in the inclusion complex formation of .ALPHA.-cyclodextrin with alcohols as studied by the titration calorimetry.
• Studies on the complex formation between o-quinones and metal chlorides in nitromethane solution.
• NMR study of molecules in anisotropic systems. II. 1a,2a,3e,4e,5e,6e- and 1e,2e,3e,4e,5e,6e-hexachlorocyclohexanes dissolved in nematic liquid crystals.
• Solution structure and preferred orientation of 3,7-dichloro-10H-phenothiazine dissolved in nematic liquid crystal.
• The solution chemistry of organotin compounds. I. A 1H NMR study of the complex formation between methyltin trichloride and 4-substituted pyridines.
• The Energy Aspect of Oil/Water Partition and Its Application to the Analysis of Quantitative Structure-Activity Relationships. Aliphatic Alcohols in the Liposome/Water Partition System.
• Association between polar molecules. III. 1H and 13C NMR studies on the dipole association of acetonitrile derivatives with tetramethylurea and dibutyl sulfoxide in nonpolar solvents.
• Thermodynamic properties of solution of nonspherical molecules determined from gas-liquid chromatography and calculated by the scaled particle theory using the Kihara potential.
• The solvation effect on the reactions in solution. I The solvation model for the interpretation of entropy changes in the complex formation of dichlorodimethylstannane with pyridine.
• The entropy of solution of alkanes measured by gas-liquid chromatography and interpreted by means of scaled particle theory.

もっと見る 閉じる

スポンサーリンク