Cur síos
Forbhreathnú ar an Táirge
1-Bromo-4-pentene (also known as 5-Bromo-1-penteneor 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.
Airíonna
5-Bromo-1-pentene exhibits the following key physical and chemical properties:
- Stádas fisiceach: Leachtach (ag teocht an tseomra).
- Cuma: Clear colorless to light yellow liquid.
- Boladh: Not specified.
- Pointe leá: -106.7 °C (estimate).
- An t-eadhon fiuchta: 126-127 °C at 765 mmHg (lit.).
- Dlús: 1.258 g/mL at 25 °C (lit.).
- Intuaslagthacht: Insoluble in water; soluble in organic solvents like chloroform, ethanol, and ether.
- Cobhsaíocht: Stable under normal conditions; incompatible with strong oxidizing agents; flammable.
- Tocsaineacht: Moderately toxic; causes skin irritation, eye irritation, and respiratory irritation; may cause dizziness, nausea, and central nervous system effects upon inhalation.
Iarratais
The primary applications of 5-bromo-1-pentene include:
- Idirmheánach na Síntéise Orgánaí: 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.
- Eile: Serves as a versatile building block in organic chemistry for introducing alkyl chains with functional groups.
Aicmiú
The following table outlines the classification of 5-bromo-1-pentene based on chemical properties, uses, and regulations:
| Cineál Aicmithe | Catagóir Shonrach | Cur síos |
|---|---|---|
| Rang Ceimice | Alkyl Halide (Bromoalkene) | An unsaturated bromoalkane, reactive in nucleophilic substitution and addition reactions. |
| Aicme Úsáide | Organic Synthesis Reagent/Intermediate | Primarily used as a reagent and intermediate in chemical synthesis. |
| Aicme Guaise | Flammable Liquid (UN 1993); Irritant | Flammable (H225, flash point ~31 °C); skin irritant (H315), eye irritant (H319), respiratory irritant (H335); Packing Group III. |
| Aicme Rialála | Ceimiceán Rialaithe (REACH, TSCA) | Listed under EU REACH and US TSCA; subject to environmental and safety controls (WGK 3 in Germany). |
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