What is the pKa of p-Aminobenzoic acid?

What is the pKa of p-Aminobenzoic acid?

Structure for FDB001037 (4-Aminobenzoic acid)

Property Value Source
logP 0.8 ChemAxon
logS -1.5 ALOGPS
pKa (Strongest Acidic) 4.77 ChemAxon
pKa (Strongest Basic) 2.69 ChemAxon

What is the pH of p-Aminobenzoic acid?

pH 3.0 and pH 7.0
At both pH 3.0 and pH 7.0, PABA potentiated the formation of the thymine dimer in aqueous solutions of thymine irradiated with light above 300 nm.

Why is tert butyl amine more basic than ammonia?

The small amount of extra negative charge built up on the nitrogen atom makes the lone pair even more attractive towards hydrogen ions. Correspondingly, primary, secondary, and tertiary alkyl amines are more basic than ammonia.

What is the pKa of a protonated amine?

The protonated amine has a pKa of 10.7, while the neutral amine has a pKa of 40. Therefore, the protonated amine is stronger. strong base has a weak conjugate acid, the deprotonated amine is a stronger base.

Is p-Aminobenzoic acid carboxylic acid?

p-Aminobenzoic acid, also known as 4-aminobenzoic acid or PABA, is an organic compound with molecular formula C7H7NO2. PABA is a white crystalline substance that is only slightly soluble in water. It consists of a benzene ring substituted with an amino group and a carboxylic acid.

Is 4-aminobenzoic acid a Zwitterion?

Ball-and-stick model of the 4-aminobenzoic acid molecule, also known as para-aminobenzoic acid or PABA, an important biological intermediate, and one of the three isomers of aminobenzoic acid. This image shows the zwitterionic form.

What is p-Aminobenzoic acid soluble in?

3.1.6. Solubility. The solubility of PABA is 6.1 g/l at 30oC in water, 125 g/l alcohol and 17 g/l ether. PABA is soluble in ethyl acetate and glacial acetic acid, slightly soluble in benzene, and practically insoluble in petroleum ether. 3.1.7.

What is the difference between amine and ammonia?

is that ammonia is (inorganic compound) a gaseous compound of hydrogen and nitrogen, nh3, with a pungent smell and taste while amine is (inorganic chemistry) a functional group formally derived from ammonia by replacing one, two or three hydrogen atoms with hydrocarbon or other radicals.

Why is amine more basic than ammonia?

Amines are stronger base than ammonia because +I effect of alkyl groups increases electron density on nitrogen atom.

What is pKa of nh3?

The pKa for ammonia is ~37.