303-04-8

Basic information

• Product Name: 2,3-DICHLOROHEXAFLUORO-2-BUTENE
• Synonyms: 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-buten;2,3-Dichloro-1,1,1,4,4,4-hexafluorobutene-2;2,3-dichlorohexafluoro-2-buten;2,3-dichlorohexafluoro-2-butene,mixtureofcisandtrans;2-Butene, 2,3-dichloro-1,1,1,4,4,4-hexafluoro-;2-Butene, 2,3-dichlorohexafluoro-;2-Butene,2,3-dichloro-1,1,1,4,4,4-hexafluoro-;cfc1316
• CAS NO: 303-04-8
• Molecular Formula: C₄Cl₂F₆
• Molecular Weight: 232.94
• EINECS: 206-133-2
• Product Categories: Alkenyl;Halogenated Hydrocarbons;Organic Building Blocks
• Mol File: 303-04-8.mol
• Article Data: 10

Chemical Properties

• Melting Point: -67 °C
• Boiling Point: 66-68 °C(lit.)
• Flash Point: 3.2°C
• Appearance: /
• Density: 1.605 g/mL at 25 °C(lit.)
• Vapor Density: 8 (vs air)
• Vapor Pressure: 4.42 psi ( 20 °C)
• Refractive Index: n20/D 1.3458(lit.)
• CAS DataBase Reference: 2,3-DICHLOROHEXAFLUORO-2-BUTENE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3-DICHLOROHEXAFLUORO-2-BUTENE(303-04-8)
• EPA Substance Registry System: 2,3-DICHLOROHEXAFLUORO-2-BUTENE(303-04-8)

Safety Data

• Hazard Codes: T+,Xi,T,C
• Statements: 26-34
• Safety Statements: 26-28-36/37/39-45
• RIDADR: UN 3389 6.1/PG 1
• WGK Germany: 3
• RTECS: EM4910000
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 303-04-8(Hazardous Substances Data)

Usage

Description

2,3-DICHLOROHEXAFLUORO-2-BUTENE is a clear colorless liquid that exists in both cis and trans isomers. These isomers can be separated through a reaction with dry diglyme and sodium borohydride, followed by hydrolysis and purification using preparative vapor phase chromatography technique.

Uses

Used in Chemical Synthesis:
2,3-DICHLOROHEXAFLUORO-2-BUTENE is used as a chemical intermediate for the synthesis of various compounds due to its unique structure and reactivity. The presence of chlorine and fluorine atoms in the molecule allows for further functionalization and the formation of a wide range of products.
Used in Pharmaceutical Industry:
2,3-DICHLOROHEXAFLUORO-2-BUTENE is used as a building block for the development of new pharmaceutical compounds. Its unique structure and properties make it a valuable candidate for the creation of novel drugs with potential applications in various therapeutic areas.
Used in Polymer Industry:
2,3-DICHLOROHEXAFLUORO-2-BUTENE can be used as a monomer in the polymer industry to produce polymers with specific properties, such as increased thermal stability, chemical resistance, or improved mechanical strength. These polymers can be utilized in various applications, including automotive, aerospace, and electronics industries.
Used in Agrochemical Industry:
2,3-DICHLOROHEXAFLUORO-2-BUTENE can be employed as a starting material for the synthesis of agrochemicals, such as pesticides and herbicides. Its unique chemical properties can contribute to the development of more effective and environmentally friendly products in this industry.
Used in Material Science:
2,3-DICHLOROHEXAFLUORO-2-BUTENE can be utilized in the development of new materials with specific properties, such as improved fire resistance, self-healing capabilities, or enhanced mechanical properties. These materials can find applications in various fields, including construction, automotive, and aerospace industries.

InChI:InChI=1/C4Cl2F6/c5-1(3(7,8)9)2(6)4(10,11)12/b2-1-

Upstream product

• 87-68-3 Hexachlorobutadiene 
• 378-84-7 2,2,3-trichloro-1,1,1,4,4,4-hexafluorobutane 
• 692-50-2 hexafluoro-2-butyne 
• 375-34-8 1,1,1,4,4,4-hexa-fluoro-2,2,3,3-tetrachlorobutane 
• 1122-17-4 dichloromaleic acid anhydride 
• 354-58-5 1,1,1-Trichloro-2,2,2-trifluoroethane 
• 151-67-7 1,1,1-trifluoro-2-bromo-2-chloroethane 
• 375-31-5 heptachloro-1,1,1-trifluoro-butane 

Downstream Products

• 355-20-4 2,3-dichloro-1,1,1,2,3,4,4,4-octa-fluorobutane 
• 335-44-4 heptafluoro-2,3,3-trichlorobutane 
• 375-34-8 1,1,1,4,4,4-hexa-fluoro-2,2,3,3-tetrachlorobutane 
• 26393-26-0 tetrakis(trifluoromethyl)tetrathiafulvalene 
• 306-83-2 1,1,1-trifluoro-2,2-dichloroethane 
• 2923-18-4 sodium 2,2,2-trifluoroacetate 
• 143425-53-0 cis-2,3-dichloro-2,3-epoxyhexafluorobutane 
• 143425-53-0 trans-2,3-dichloro-2,3-epoxyhexafluorobutane 
• 1516-65-0 (Z)-perfluoro-2-butene 
• 1516-64-9 (E)-perfluoro-2-butene 
• 76-05-1 trifluoroacetic acid 
• 400-44-2 2?chloro?1,1,1,4,4,4?hexafluoro?2?butene 
• 407-59-0 1,1,1,4,4,4-hexafluorobutane 
• 692-50-2 hexafluoro-2-butyne 

Relevant articles and documents

Gas-phase continuous synthesis method of cis-1,1,1,4,4,4-hexafluoro-2-butene

The invention discloses a gas-phase continuous synthesis method of cis-1,1,1,4,4,4-hexafluoro-2-butene. The method includes the following preparation steps: (1) mixing 1,1,1-trifluorotrichloroethane with hydrogen for a reaction so as to obtain a product stream I, transferring the product stream I to a first separation tower, absorbing the mixed product stream obtained at the tower top through a HCl absorption tower, and returning the mixed product stream to a reactor I so as to obtain 1,1,1,4,4,4-hexafluoro-2,3-dichloro-2-butene in the tower kettle; (2) transferring the tower kettle liquid obtained in the step (1) to a preheater II, introducing hydrogen at the same time, performing mixing and preheating until 200 DEG C, transferring the preheated mixture to a reactor II, performing a hydrodechlorination reaction under the action of a catalyst so as to obtain a product stream II, transferring the product stream II to a second separation tower, and circulating the tower kettle liquid tothe reactor II; and (3) transferring the tower top product obtained in the step (2) to a preheater III, performing preheating to 260 DEG C, transferring the preheated product to a reactor III, performing an isomerization reaction under the action of a catalyst so as to obtain a product stream III, transferring the product stream III to a third separation tower so as to obtain cis-1 1,1,4,4,4-hexafluoro-2-butene in the tower kettle.

Method for preparing 1,1,1,4,4,4-hexafluoro-2-butene

The invention relates to a method for preparing 1,1,1,4,4,4-hexafluoro-2-butene. The method for preparing the 1,1,1,4,4,4-hexafluoro-2-butene comprises the following steps: (1) carrying out a reactionon 1,1,1-trifluorochloroethane and/or 1,1,1-trifluoro-2,2-dichloroethane used as raw materials in lights by using chlorine as a catalyst to generate 1,1,1,4,4,4,4-hexafluoro-2,2,3,3-tetrachlorobutane; (2) dechlorinating the 1,1,1,4,4,4,4-hexafluoro-2,2,3,3-tetrachlorobutane obtained in step (1) with zinc powder to prepare 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutene; and (3) reacting the 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutene obtained in step (2) with hydrogen in the presence of a hydrogenation catalyst to obtain the 1,1,1,4,4,4-hexafluoro-2-butene. The method has the advantages of easily available catalyst and raw materials, production of the final product from the above intermediate in multiple paths, and high yield.

PROCESS FOR CIS 1,1,1,4,4,4-HEXAFLUORO-2-BUTENE

Disclosed is a process for preparing cis-1,1,1,4,4,4-hexafluoropropene comprising the steps of (a) reacting CCl4 with a compound having the formula CF3CX═CXH, where each X is independently halogen or hydrogen, to form a compound having the formula CF3CXClCXHCCl3; (b) fluorinating the compound formed in step (a) to form a compound having the formula CF3CXHCXHCF3; (c) converting the compound formed in step (b) by a reaction selected from the group consisting of dehydrohalogenation, dehalogenation and both reactions, to form a compound having the formula CF3C≡CCF3; and (d) catalytically reducing the compound formed in step (c) with hydrogen to form the compound having the formula: