2017年10月27日 · In short, the stronger the acid, the smaller the pKa value and strong acids have weak conjugate bases. pKa values describe the point where the acid is 50% dissociated (i.e. deprotonated). Below are tables that include determined pKa values for various acids as determined in water, DMSO and in the gas Phase.

2017年4月18日 · Here’s three key points for today: The best way to quantify the basicity of an amine is to examine the pKa of its conjugate acid. The higher the pKa of the conjugate acid, the stronger the base. Table of Contents. What Key Factors Govern The Basicity Of Amines? 1. Quick Review: Acids, Bases, Conjugate Acids, and Conjugate Bases.

2010年6月18日 · Not knowing pKa values in organic chemistry is like not knowing the value of the hands in poker. In this scheme, alkyl anions are the equivalent of the royal flush – they win the proton from everything underneath them in the table. Why is pK a so important? Because every nucleophile is potentially a base, and vice versa.

PHOSPHATES AND PHOSPHONATES CF3- 1.16, 3.93 57 CCl3- 1.63, 4.81 57 Phosphates NH3+CH2- 2.35, 5.9 57 Compound pK Ref. (–OOCCH2)2NH+CH2– --, 5.57 57 Phosphate 1.97, 6.82, 12.5 55 CHCl 2- 1.14, 5.61 57 Glyceric acid 2-phosphate 3.6, 7.1 53

Equilibrium pKa Table (DMSO Solvent and Reference) Hydrocarbons 20.117 21.822 22.522 17.317 Ph 18.019 26.122 Fluorenes X X = H 22.61 Me 22.31 Ph 17.91 tBu 24.421 SiMe3 21.5 26 SiPh3 18.6 26 = Fl-X

此数据由哈佛大学的David Ripin and David Evans收集，包括以下化合物的pKa。 Inorganic Acids Alcohols, Oximes, Hydroxamic Acids, and Peroxides Carboxylic Acids Protonated Carbonyl Componds, Protonated E…

2010年9月29日 · We’ll go through the exact details of how to use pK a values to tell if an acid base reaction is favorable or unfavorable. pK a is the negative logarithm of the acid dissociation constant, K a, which can be measured experimentally.

Approximate pKa chart of the functional groups: values to know 1. Protonated carbonyl pKa = ‐7 Other important pKa’s 2. Protonated alcohol or ether pKa = ‐2 to ‐3 H2 = 35 3.

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H2SO4 HBr HI I Br HSO4 TsOH HNO3 HF O H O H O H H O H O H H O H O O O H NH H2CO3 HN 3 O H H H2S HCl Cl H F N NO3 SH TsO- HCO3 N O O-10-9-8-3.6-2.4-1.7-1.3 4.7 4.8 3.2 sulfuric acid hydroiodic acid hydrobromic acid