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27 paź 2017 · Below are tables that include determined pKa values for various acids as determined in water, DMSO and in the gas Phase. These tables are compiled in PDF files below. For a more comprehensive discussion on this topic, please see Acidity and Basicity by professor William Reusch, Michigan State University.
- Fundamentals of Organic Chemistry
This section of professor Reich's collection contains...
- Reduction and Oxidation
Reduction and Oxidation - Bordwell pKa Table - Organic...
- Pericyclic Reactions
Pericyclic Reactions - Bordwell pKa Table - Organic...
- Organometallic Chemistry
Organometallic Chemistry - Bordwell pKa Table - Organic...
- Reactive Intermediates
This page by Professor Hans Reich (UW-Madison) provides some...
- Named Reagents
Named Reagents - Bordwell pKa Table - Organic Chemistry Data
- Natural Product Syntheses
This set of pages is a collection of short natural product...
- Acronyms
lf the aldol reaction is considered a name reaction, and all...
- Fundamentals of Organic Chemistry
where Kwater = 1.01 × 10–14 at 25 °C. Note that pKa + pKb = pKwater. All values refer to dilute aqueous solutions at zero ionic strength at the temperature indicated. The table is arranged alphabetically by compound name. In the case of bases, the entry in the table is for the conjugate acid; e.g., ammonium ion for ammonia.
pKa Data Compiled by R. Williams pKa Values INDEX Inorganic 2 Phenazine 24 Phosphates 3 Pyridine 25 Carboxylic acids 4, 8 Pyrazine 26 Aliphatic 4, 8 ... Phosphate 1.97, 6.82, 12.5 55 CHCl 2- 1.14, 5.61 57 Glyceric acid 2-phosphate 3.6, 7.1 53 CH2CI- 1.40, 6.30 57 Enolpyruvic acid 3.5, 6.4 53 CH2Br- 1.14, 6.52 57
Table of Acids with Ka and pKa Values* CLAS * Compiled from Appendix 5 Chem 1A, B, C Lab Manual and Zumdahl 6 th Ed. The pKa values for organic acids can be found in
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
The pKa of a strong acid is less than zero. pKa is the negative log base ten of the Ka value, to be precise (acid dissociation constant). It determines an acid’s strength, or how tightly a proton is held by a Bronsted acid.
This is “Appendix C: Dissociation Constants and pKa Values for Acids at 25°C”, appendix 3 from the book Principles of General Chemistry (index.html) (v. 1.0M). This book is licensed under a Creative Commons by-nc-sa 3.0 (http://creativecommons.org/licenses/by-nc-sa/ 3.0/) license.
