Bordwell pKa Table - Organic Chemistry Data
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.
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 Aromatic 7, 8 Quinoline 27 ... (CH2)5CH(COOH)- 1, -- 57 tetrametaphosphate 2.74 77 Provided by the ACS, Organic Division Updated 4/7/2022 Page 3.
The pKa Table Is Your Friend - Master Organic Chemistry
2010年6月18日 · If there is a side chain pKa involved, you take the 2 pKa values that are closest together, add them, and then divide by 2. An isolectric pH is the pH at which a given amino acid has a net zero charge.
11.4: pKa Table - Chemistry LibreTexts
pKa VALUES OF COMMON ORGANIC AND INORGANIC ACIDS. This page titled 11.4: pKa Table is shared under a not declared license and was authored, remixed, and/or curated by Sergio Cortes.
6.4: Acid strength and pKa - Chemistry LibreTexts
Rank the three compounds below from lowest pKa to highest, and explain your reasoning. Hint – think about both resonance and inductive effects!
Approximate pKa chart of the functional groups: values to know. Protonated carbonyl pKa = ‐7. Other important pKa’s. 2. Protonated alcohol or ether pKa = ‐2 to ‐3. H2 = 35. 3. Carboxylic acid pKa = 4‐5.
8.3: pKa Values - Chemistry LibreTexts
The pKa measures how tightly a proton is held by a Bronsted acid. A pKa may be a small, negative number, such as -3 or -5. It may be a larger, positive number, such as 30 or 50.
pKa Table: Effect of electronegativity and resonance e.g. Na+ Na+ H2SO4-4 HSO4-HNO3-2 NO3-HCCH 25 alkyne H2N-HCC acetylide e.g., sodium acetylide HCCNa+ H-H Hyg rogen H-H ydie.g,soumh 35 H-Na+ HN H H H 9(10) H3N. B utane CH3CH 2CH2 CH2 - B tylcar bn io e.g, hm CH3CH2CH2CH2-H60 H3 B a s i c i t y Li+ CC H H H H 44 alkene. Title: pKa.cdx
H2O HO ROH RO RS H3CCH3 O H3CCH2 O NC CH3 NC CH2 RC CH RC C NH3 H2N R2CCH R2CCH RC H RC 15.7 16–17 Acid pKa Conjugate Base 11 20 25 25 38 44 ~ 48–53 (p. 2 of 2) NH4 H3N OH O 9.2 10 R R OO H H R R OO H 9 (alkanes) (alcohols) ArCH3 40 ArCH2 2 RSH
Equilibrium pKa Table (DMSO Solvent and Reference) Nitro X = H 17.21 O2N-CH2-X Me 16.71 Ph 12.29 SPh 11.810 SO2Ph 7.1 6 COPh 7.76 O2N 16.9 2 N X C X = H 31.31 Me 32.55 Ph 21.99 COPh 10.26 C O-N 17.218 CO2 Et 13.1 18