p-Fluorobenzoic Acid
Title: p-Fluorobenzoic Acid
CAS Registry Number: 456-22-4
Molecular Formula: C7H5FO2
Molecular Weight: 140.11
Percent Composition: C 60.01%, H 3.60%, F 13.56%, O 22.84%
Literature References: Prepd by treating p-carbethoxybenzenediazonium chloride with fluoboric acid, followed by thermal decompn of the resulting p-carbethoxybenzenediazonium fluoborate and by hydrolysis of the ensuing ethyl ester of p-fluorobenzoic acid: Schiemann, Winkelmüller, Org. Synth. 13, 52 (1933).
Properties: Monoclinic prisms from water. Peculiar sweet taste. mp 182.6°. Sparingly sol in cold water; freely sol in hot water. Soly in water at 32°: 1.1 g/l. Water solns evaporate without leaving a residue. Sol in alc, ether. pK (25°): 3.85.
Melting point: mp 182.6°
pKa: pK (25°): 3.85
Derivative Type: Ethyl ester
Molecular Formula: C9H9FO2
Molecular Weight: 168.16
Percent Composition: C 64.28%, H 5.39%, F 11.30%, O 19.03%
Properties: Crystals, mp 26°. bp 210°.
Melting point: mp 26°
Boiling point: bp 210°

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