Hydrophobic interaction chromatography of aliphatic alcohols and carboxylic acids on octyl-sepharose CL-4B: mechanism and thermodynamics

Prediction of pKa Values for Aliphatic Carboxylic Acids and Alcohols with Empirical Atomic Charge Descriptors

Two quantitative pKa prediction models for aliphatic carboxylic acids and for alcohols were developed by multiple linear-regression (MLR) analysis with empirical atomic descriptors. The acid and alcohol molecules were described by a set of five and four atomic descriptors, respectively. For the pKa model of 1122 aliphatic carboxylic acids, the squared correlation coefficient is 0.813 with a sta...

Chromatography of Glutenin on Sepharose CL-4B in Dissociating Solvents: Molecular Weight Composition of Covalently Bonded Glutenin'

Recently we reported that removal of noncovalently bonded protein from glutenin resulted in decreased viscoelasticity. In that study, two glutenin fractions were isolated by successive gel filtration of glutenin on Sephadex G-200 in the solvents acetic acid-guanidine hydrochloride (GuHCl)-cetyltrimethylammonium bromide (AGC) and sodium dodecyl sulfate (SDS). This note reports the S20,W values o...

Zirconium Dodecylphosphonate: Selective and Constructive Catalyst for Preparation of 2-Alkyl Benzoxazoles from Aliphatic Carboxylic Acids

In this study, zirconium dodecylphosphonate was synthesized by the reported method in scientific literature. 2-Alkylbenzoxazoles were prepared from aliphatic carboxylic acids and 2-aminophenol in the presence of this catalyst under solvent-free conditions at 100°C. Their structures were recognized by IR, 1H NMR, and 13C NMR. Then, we used aromatic carboxylic acids in t...

synthesis of sulfides from alcohols and thiols in solvent-freeconditions and deoxygenation of sulfoxides

کاتالیست یک سنتز جدید برای تیواترها توصیف شده است. واکنش الکل ها با آریل، هتروآریل و آلکیل تیو ل ها درحضور 1،3،5- تری آزو- 2،4،6- تری فسفرین-2،2،4،4،6،6 هگزاکلراید ((tapc به عنوان یک کاتالیست موُثر، بازده های خوب تا عالی از تیواترها را حاصل می کند. علاوه براین، واکنش تحت شرایط بدون فلز و بدون حلال پیش می رود، بنابراین یک مکمل جالب برای روش های شناخته شده سنتز تیواترها ارائه می دهد. یک مکانیسم ا...

Hydrophobic Interaction Chromatography