beta-Bromopropionic Acid
Title: b-Bromopropionic Acid
CAS Registry Number: 590-92-1
CAS Name: 3-Bromopropanoic acid
Molecular Formula: C3H5BrO2
Molecular Weight: 152.97
Percent Composition: C 23.56%, H 3.29%, Br 52.24%, O 20.92%
Line Formula: BrCH2CH2COOH
Literature References: Prepd by the action of hydrobromic acid on acrylic acid, on hydracrylic acid, and on ethylene cyanohydrin: Kendall, McKenzie, Org. Synth. 3, 25 (1923). Prepn of the ethyl ester: eidem, ibid. 51; of the methyl ester: Mozingo, Patterson, ibid. 20, 64 (1940).
Properties: Plates from CCl4. mp 62.5°. pK (25°): 4.00. Sol in water, alcohol, ether, chloroform, benzene. Aq alkalies hydrolyze b-bromopropionic acid to hydracrylic acid.
Melting point: mp 62.5°
pKa: pK (25°): 4.00
Derivative Type: Ethyl ester
Molecular Formula: C5H9BrO2
Molecular Weight: 181.03
Percent Composition: C 33.17%, H 5.01%, Br 44.14%, O 17.68%
Properties: Liquid. Pungent odor. Becomes yellow on exposure to light. d418 1.4123. bp44 112°; bp12 70°. nD18 1.4569. Insol in water; miscible with alchol, ether. Protect from light.
Boiling point: bp44 112°; bp12 70°
Index of refraction: nD18 1.4569
Density: d418 1.4123
Derivative Type: Methyl ester
Molecular Formula: C4H7BrO2
Molecular Weight: 167.00
Percent Composition: C 28.77%, H 4.22%, Br 47.85%, O 19.16%
Properties: Liquid. d15 1.4897. bp27 80°. bp18 65°.
Boiling point: bp27 80°; bp18 65°
Density: d15 1.4897

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