Calorimetric determination of thermodynamic parameters for the dissociations of acids in dipolar aprotic solvents.
スポンサーリンク
概要
- 論文の詳細を見る
A calorimetric method has been investigated for the determination of the thermodynamic parameters of acid dissociations in dipolar aprotic solvents. For the dissociations of monoprotonated bases BH<SUP>+</SUP> (B: aniline, pyridine, triethylamine, tributylamine, triethanolamine, 1,3-diphenylguanidine and 1,1,3,3-tetramethylguanidine) in <I>N</I>,<I>N</I>-dimethylformamide, dimethyl sulfoxide (DMSO), acetonitrile and propylene carbonate, the solutions of the bases were titrated with small volumes of a "strong acid," trifluoromethanesulfonic acid. In each solvent, there was an approximately linear relation of unit slope between Δ<I>H</I><SUB>298</SUB>° and Δ<I>G</I><SUB>298</SUB>° showing that the difference in p<I>K</I><SUB>a</SUB> between different BH<SUP>+</SUP>'s can mainly be attributed to the difference in the enthalpy term. As for the solvent effect on p<I>K</I><SUB>a</SUB>, however, the entropy term seems to play an important role. A preliminary study has shown that the calorimetric method is also applicable to the dissociations of HX-type weak acids (benzoic and salicylic acids in DMSO, for example), if the dissociation equilibria are not complicated by such reactions as homoconj ugation.
- 公益社団法人 日本化学会の論文
著者
-
Takeda Akihiko
Department Of Digestive Surgery Research Center For Genomic Medicine Saitama Medical University
-
Nakamura Toshio
Department Of Biophysics Neuroinformation Research Institute School Of Medicine Kanazawa University
-
IZUTSU Kosuke
Department of Chemistry, Faculty of Science, Shinshu University
-
Izutsu Kosuke
Department Of Chemistry Faculty Of Science Shinshu University
-
Takizawa Katsumi
Department of Chemistry, Faculty of Science, Shinshu University
-
Takeda Akihiko
Department of Chemistry, Faculty of Science, Shinshu University
関連論文
- Radiometric ages and Nd-Sr isotopic compositions of felsic plutonic rocks from the Ulleungdo volcanic island, South Korea(Proceedings of the 19^ Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part
- Prediction of Deformation in the Potassium-Arrested Canine Left Ventricle Using the Finite Element Model
- Effects of Changes in Chamber Geometry by Chronic Pressure-Overload on Wall Stress and Strain as Studied in the Potassium-Arrested Canine Left Ventricle
- Human Arm protein lost in epithelial cancers, on chromosome X 1 (ALEX1) gene is transcriptionally regulated by CREB and Wnt/β-catenin signaling
- Endoscopic pancreatic duct drainage and stenting for acute pancreatitis and pancreatic cyst and abscess
- Presence of Serum p53 Antibodies is Associated with Decreased In Vitro Chemosensitivity in Patients with Esophageal Cancer
- Evaluation of a New Staging System by the Japanese Research Society for Gastric Cancer
- Clinical Study of Cerebrospinal Fluid Dynamics Using ^In-DTPA SPECT in Patients With Subarachnoid Hemorrhage
- Operative Anatomy and Classification of the Sylvian Veins for the Distal Transsylvian Approach
- Crohn's Disease of the Esophagus : Report of a Case
- Potentiometric Response Mechanism of a Poly(acrylamide)-phthalocyaninato Tin(II)Film Coated Platinum Electrode in Acetonitrile and N,N-Dimethylacetamide
- A Case of Pulmonary Pseudolymphoma : Five Year's Roentgenographic Observation
- DUODENAL ADENOMA OF GASTRIC FOVEOLAR PHENOTYPE IN THE SECOND PORTION OF THE DUODENUM
- Simultaneous Superficial Temporal Artery to Middle Cerebral or Anterior Cerebral Artery Bypass With Pan-synangiosis for Moyamoya Disease Covering Both Anterior and Middle Cerebral Artery Territories : Technical Note
- Pancreatic β Cell Mass Preserved in Heterozygous PDK1 Knockout Mice
- Fracture Resistance of Inlay-retained Fixed Partial Dentures Reinforced with Fiberreinforced Composite
- A clinical investigation of lymphadenopathy in general internal medicine outpatients
- Enhanced Enzymatic Reaction of Tyrosinase-immobilized Polyacrylamide-(γ-Cyclodextrin) Membrane Coated on a Platinum Disk Electrode in Acetonitrile
- Electrochemical Behavior of Catechol and 3,4-Dihydroxytoluene in Acetonitrile at a Platinum-Disk Electrode Modified with a Tyrosinase Containing Polyacrylamide Film
- On-Line System for Measuring Bubble Chamber Films with Manual Digitizer
- Preparation, Structures and Properties of Novel Mono-and Trinuclear Iron(III)Complexes with Mixed Ligands
- Novel Dinuclear Manganese(III) Complexes with Tridentate and Bridging Tetradentate Schiff Base Ligands: Preparation, Properties and Catalase-like Function
- Decrease of Built-in Voltage in Tunnel Diodes Caused by Irradiation
- Application of the Nanogold-4,4'-bis(methanethiol)biphenyl Modified Gold Electrode to the Determination of Tyrosinase-Catechol Reaction Kinetics in Acetonitrile
- Potentiometric Response Properties of Sensor Membranes Based on Cobalt Phthalocyanine Conjugate-Polymer in Nonaqueous Solutions
- Thermal Modulation Voltammetric Observatin of Cyanide Ion in the Membrane Part of an Ion-Selective Electrode Based on a Polymer Modified with Cobalt Phthalocyanine in Acetonitrile
- Amperometric Sensor for Hydrogen Peroxide Based on Immobilized Cytochrome c on Binary Self-assembled Monolayers
- A New Method for Enhancing Contrast of Hatchett's Brown at the Sites of Acetylcholinesterase Activity by Rubeanic Acid
- An Improved Double Staining Method for Acetylcholinesterase Activity and Nerve Axon in Fresh Frozen Sections of the Skeletal Muscle.
- Simultaneous visualization of catecholamine fluorescence and choinesterase activity in the peripheral autonomic nerve
- Activation Effects of a Platinum Electrode by Laser Pulse Irradiation on the Electro-Oxidation of Glucose in Alkaline Solution
- Use of pH-Sensitive ISFETS as Sensors for pH in Nonaqueous Solutions and for Proton Solvation
- Development and Application of Ion-Selective Electrodes in Nonaqueous Solutions
- The Preparation and Electrochemical Behavior of Density-controlled Gold Nano-particle Self-assembled Interface
- Electrochemical Biosensors in Nonaqueous Solutions and Their Applications
- The Response Behavior of a Polyacrylamide-Benzo-15-C-5 Electrode to Sodium and Calcium Ions in Acetonitrile and Its Application to the Study of Their Complexing with Other Basic Aprotic Solvent Molecules
- Direct Surgical Treatment of Giant Middle Cerebral Artery Aneurysms Using Microvascular Reconstruction Techniques
- Liquid Junction Potential between Different Solvents : The Component due to Solvent-Solvent Interactions Is Dipole Potential in Nature
- Liquid Junction Potential between Electrolyte Solutions in Different Solvents Studied by Use of Mixed Solvent/Pure Solvent Junctions
- Depolarization Temperature Shift of Li0.08Na0.92NbO3 Lead-Free Piezoelectric Ceramics by High-Electric-Field Poling
- Direct Surgical Treatment of Giant Intracranial Aneurysms on the Anterior Communicating Artery or Anterior Cerebral Artery
- Polarographic Reductions of Some Alkali and Alkaline Earth Metal Ions in Dimethylacetamide. Effect of Cation of the Supporting Electrolyte
- Calorimetric determination of thermodynamic parameters for the dissociations of acids in dipolar aprotic solvents.
- The Significance of Intraoperative Monitoring of Muscle Motor Evoked Potentials during Unruptured Large and Giant Cerebral Aneurysm Surgery
- Differences of Degradation Products from Glucosinolates in Rape Seeds (Brassica napus L.) on the Basis of Experimental Conditions
- Potentiometric study of thermodynamic parameters of complexing of lithium ion-basic aprotic solvents and sodium ion-macrocyclic polyethers in acetonitrile.
- Behavior of polyacrylamide-acyclic poly(oxyethylene)-coated ion-selective electrodes in nonaqueous solvents.
- Polarographic Investigation of Alkali Metal Ions in Hexamethylphosphoramide
- Experimental studies of the liquid junction potential between electrolyte solutions in different solvents. I. Water-organic solvent junctions.
- Direct Surgical Treatment of Giant Intracranial Aneurysms on the Anterior Communicating Artery or Anterior Cerebral Artery