Descrição

Product Overview

5-Bromo-1-pentene (also known as 1-Bromo-4-pentene or 4-Pentenyl bromide) CAS No.: 1119-51-3 , with the chemical formula C₅H₉Br and a molecular weight of 149.03 g/mol. It is a clear colorless to light yellow liquid. This compound belongs to the class of alkyl halides with an alkene group and is primarily used in organic synthesis and as a reagent, though it is subject to safety regulations due to its flammable and irritant properties.

Properties

5-Bromo-1-pentene exhibits the following key physical and chemical properties:

• Physical State: Liquid (at room temperature).
• Appearance: Clear colorless to light yellow liquid.
• Odor: Not specified.
• Melting Point: -106.7 °C (estimate).
• Boiling Point: 126-127 °C at 765 mmHg (lit.).
• Density: 1.258 g/mL at 25 °C (lit.).
• Solubility: Insoluble in water; soluble in organic solvents like chloroform, ethanol, and ether.
• Stability: Stable under normal conditions; incompatible with strong oxidizing agents; flammable.
• Toxicity: Moderately toxic; causes skin irritation, eye irritation, and respiratory irritation; may cause dizziness, nausea, and central nervous system effects upon inhalation.

Applications

The primary applications of 5-bromo-1-pentene include:

• Organic Synthesis Intermediate: Used in the stereoselective synthesis of 7α-(3-carboxypropyl) estradiol, preparation of thioacetates like those in sialic acid derivatives, and recent syntheses of DL-histrionicotoxin and benzophenone-containing fatty acids.
• Reagent: Employed in the production of pharmaceuticals, agrochemicals, fragrances, polymers, and as an analytical reagent.
• Other: Serves as a versatile building block in organic chemistry for introducing alkyl chains with functional groups.

Classification

The following table outlines the classification of 5-bromo-1-pentene based on chemical properties, uses, and regulations: