2017年10月27日 · pKa is an acid dissociation constant used to describe the acidity of a particular molecule. Its value is directly related to the structure of the given compound.

D.H. Ripin, D.A. Evans 19-20 9 13 11 24.5 H2 ~36 *Values <0 for H2O and DMSO, and values >14 for water and >35 for DMSO were extrapolated using various methods. HCCH Substrate SubstrateSubstrate pKa H2O (DMSO) Substrate AMIDES HYDROCARBONS pKa H2OH(DMSO) pKa pKa2O (DMSO) H2O (DMSO) CH4 CH2=CHCH3 PhH CH2=CH2 PhCH3 Ph2CH2 …

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 ... Special Table Heterocycles 22 Indicators 31 Acridine 23 References 32-34 Benzoquinoline 24 Cinnoline 23 Hydantoin 24 Imidazole 24 For complex chelating agents, see also reference 77.

This page titled 11.4: pKa Table is shared under a not declared license and was authored, remixed, and/or curated by Sergio Cortes.

In a nutshell, pKa indicates what pH a chemical species must have in order to donate or absorb a proton. Table of Contents. pka and Acidity; pKa Table; Frequently Asked Questions – FAQs; pka and Acidity. The molecular structures of acids and bases have a …

Table of Acids with Ka and pKa Values* CLAS * Compiled from Appendix 5 Chem 1A, B, C Lab Manual and Zumdahl 6th Ed. The pKa values for organic acids can be found in Appendix II of Bruice 5th Ed.

The pka of water and H 3O+ have been experimentally determined to be 14.0 and 0.0, respectively. Earlier values of 15.7 and –1.74, respectively are erroneous numbers proposed by scientists who made some errors in the calculated “rational” values. See: 1) Helv. Chim. Acta 2014, 97, 1. and 2) J. Chem. Educ. 2017, 94, 690.

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.

Values for the negative logarithm of the acid dissociation constant, pKa, of inorganic acids and bases, as well as hydrated metal ions. Definitions of the acid dissociation constant and pKa are given below the table. pK a values given in the table are measuered at 25°C, unless other temperature (°C) is indicated with superscript at the pKa value.

For a comprehensive compilation of Bordwell pKa data see: http://www.chem.wisc.edu/areas/reich/pkatable/index.htm. *Values <0 for H2O and DMSO, and values >14 for water and >35 for DMSO were extrapolated using various methods. Advanced Org. Chem., 3rd Ed. J. March (1985) Unpublished results of W. P. Jencks.