Evaluation of the basicity of sulfoxides by measurements of chemical shifts in aqueous sulfuric acidKinetic data demonstrates that the exchange of hydrogen at the 2-position of thiazolium ions cannot occur through the tetrahedral intermediate formed by nueleophilic addition of hydroxide to the 2-...
至于the basicity of acid的definition： refers to the number of replaceable hydrogen atoms in one molecule of the acid。如果你是用普通字典，或者计算机翻译，那绝对会翻译出碱 度之类的意思，但这也无可厚非，这是专业词汇的解释。其实不止国内，国外学生一开始接触这个概念绝对也会出错。以下引用...
Basicity of ethanol. Acidity function for alcohols Chemical shift data have been used to determine the basicity of ethanol in sulfuric acid solutions. This technique indicates that ethanol is one-half protonated in approximately 70% H2SO4 (H0 = -5.9) and that the protonated species has a... ...
Thermodynamics of protonation of N,N-dimethylthioamides in aqueous sulfuric acid The protonation (m* and ) and thermodynamic (ΔG°, ΔH°, ΔS°) parameters of ionization of four thioamides RCSNMe2 (R = Me, Et, i-Pr, t-Bu) have been de... A Bagno,V Lucchini,G Scorrano - 《Can...
What is the conjugate base of H2SO3? What is bond dissociation enthalpy? What is the IUPAC name for NH3? What is a polyatomic cation? Describe the following as being a Bronsted acid, base, or both: a) H2CO3 b) HCO3-1 c) CO3-2 What is the formula for hydrosulfuric acid? What is...
The basicity constants \\((pK_{BH^ + } ,pK_{BH^{2 + } } )\\) of 1,2-, 1,3-, and 1,4-bis(tetrazol-5-yl)benzenes and their N-tert -butyl derivatives in aqueous sulfuric acid and the dissociation constants (p K HB ) of the corresponding H-complexes with p -fluorophenol ...
Wholesale Price Industrial Liquid H2so4 CAS 7664-93-9 Sulfuric Acid Price Sulphuric Acid 98%Min US$150.00-180.00 / Ton 36% 32% 31% CAS No 7647-01-0 Liquid HCl Hydrochloric Acid with Competitive Price US$150.00-200.00 / Ton Industrial Muriatic Acid ...
pyridin-2-yl)porphyrin, 13,17-diethyl-2,3,7,8,12,18-hexamethyl-5-(pyridin-2-yl)porphyrin, and 13, 17-diethyl-2,3,7,8,12,18-hexamethyl-5-(pyridin-4-yl)porphyrin were synthesized, and their basic properties were studied by spectrophotometric titration in the system ethanol-sulfuric acid...
The basicities (pK BH+ ) of 13 natural isoflavones have been determined spectrophotometrically in sulfuric acid solutions. It has been shown that the change of basicity in this series of compounds depends on the geometry of the molecules and on intramolecular effects....
We have determined the basicity of 3,6-diphenyl-1,2,4,5-tetrazine in aqueous solutions of sulfuric acid (pK BH+ is 4.8). According to quantum chemical calculations done by the MNDO method and the ab initio method in a 6-31G++ basis, the tetrazine ring is a nonpolar, highly aromatic ...