2-Thiophene - Names and Identifiers
2-Thiophene - Introduction
2-thiophene(2-thiophene) is an organic compound whose molecular structure consists of an aromatic ring containing five carbon atoms and one sulfur atom. The following is a detailed description of the nature, use, preparation and safety information of 2-thiophene:
Nature:
1. Appearance: 2-thiophene is a colorless to slightly yellow liquid or solid.
2. Solubility: 2-thiophene can be well dissolved in common organic solvents (such as ethanol, dimethylformamide, etc.).
3. Melting point and boiling point: 2-thiophene has a melting point of -39 ℃ and a boiling point of 84 ℃.
4. Chemical reaction: 2-thiophene is easy to oxidize in the presence of oxygen. It can be substituted with halogen, electrophilic addition, nucleophilic addition and dipolar addition.
Use:
1. Organic Synthesis: 2-thiophene can be used as an intermediate in organic synthesis, and can participate in the synthesis of many drugs, dyes and heterocyclic compounds.
2. Electronic materials: 2-thiophene has good conjugation and conductivity, and is often used to prepare organic electronic materials, such as organic solar cells, organic light-emitting diodes (OLED), etc.
Method:
The preparation methods of 2-thiophene mainly include the following:
1. Hofmann reaction: 2-thiophene can be obtained by reacting phosphorus pentasulfide (P2S5) and aldehyde compounds at high temperature.
2. Phosphorus pentachloride method: through the reaction of phosphorus pentachloride (PCl5) and aldehydes, the corresponding alkyd Ester is generated, and then 2-thiophene is generated through deacidification reaction.
Safety Information:
1. 2-thiophene can burn at high temperatures and produce toxic sulfide gases. Please be careful to avoid contact with open flames and high temperatures.
2. 2-thiophene has a certain irritation and toxicity, should avoid inhalation or contact with skin and eyes.
3. When handling 2-thiophene should take appropriate protective measures, such as wearing protective glasses, gloves and protective clothing.
4. 2-thiophene should avoid contact with oxygen, strong oxidants and strong acids during storage and transportation to prevent dangerous reactions.
Summary: 2-thiophene is an organic compound with a wide range of applications. It has an important position in the field of organic synthesis and electronic materials. Pay attention to safety and take appropriate protective measures when using and handling 2-thiophene.
Last Update：2024-04-09 21:32:45