1941-19-1

Basic information

• Product Name: TETRAMETHYLPHOSPHONIUM CHLORIDE
• Synonyms: TETRAMETHYLPHOSPHONIUM CHLORIDE;PhosphoniuM,tetraMethyl-, chloride (8CI,9CI);tetramethylphosphanium:chloride
• CAS NO: 1941-19-1
• Molecular Formula: C₄H₁₂P*Cl
• Molecular Weight: 126.56
• Product Categories: Greener Alternatives: Catalysis;Phase Transfer Catalysts;Phosphonium Salts
• Mol File: 1941-19-1.mol
• Article Data: 7

Chemical Properties

• Melting Point: 396-397℃
• Appearance: /
• CAS DataBase Reference: TETRAMETHYLPHOSPHONIUM CHLORIDE(CAS DataBase Reference)
• NIST Chemistry Reference: TETRAMETHYLPHOSPHONIUM CHLORIDE(1941-19-1)
• EPA Substance Registry System: TETRAMETHYLPHOSPHONIUM CHLORIDE(1941-19-1)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-37/39
• WGK Germany: 3
• Hazardous Substances Data: 1941-19-1(Hazardous Substances Data)

Usage

General Description

Tetramethylphosphonium chloride is a colorless liquid chemical compound often used as a phase transfer catalyst in chemical reactions. Its chemical formula is [(CH3)4P]Cl, featuring the phosphonium ion, and it is a quaternary phosphonium salt. TETRAMETHYLPHOSPHONIUM CHLORIDE is soluble in water and alcohol and is dangerous when it comes into contact with skin or if ingested. It has a high melting point around 430-432°F (221-222°C) and decomposes upon heating, producing corrosive fumes of phosphorus oxides and hydrogen chloride. It is rated as hazardous according to the GHS classification system.

InChI:InChI=1/C4H12P.ClH/c1-5(2,3)4;/h1-4H3;1H/q+1;/p-1

Upstream product

• 14580-91-7 trimethyl(methylene)phosphorane 
• 75-36-5 acetyl chloride 
• 7719-12-2 phosphorus trichloride 
• 1284-81-7 tris(cyclopentadienyl)chlorouranium(IV) 
• 616-38-6 carbonic acid dimethyl ester 
• 113892-37-8 {MoCl₃(CO)(P(CH₃)3)3}^(1-)*P(CH₃)4⁽¹⁺⁾={MoCl₃(CO)(P(CH₃)3)3}{P(CH₃)4} 
• 18165-19-0 2-chloroethyl silane 
• 18395-90-9 Di-tert-butyldichlorosilane 
• 18147-18-7 tert-butyldichloromethylsilane 
• 74-87-3 methylene chloride 
• 917-64-6 methyl magnesium iodide 

Downstream Products

• 74-85-1 ethene 
• 74-87-3 methylene chloride 
• 594-09-2 trimethylphosphane 

Relevant articles and documents

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METHOD FOR PREPARING QUATERNARY PHOSPHONIUM SALTS

A two-step pathway for preparing high pure quaternary phosphonium salts is disclosed. In the first step, hydrogen phosphide (PH3) or a higher phophine reacts with a protonic compound to produce a phosphonium salt, which then reacts with a carbo

Synthesis, characterization, and properties of the η2-acyl complexes Mo(η2-COCH2CMe3)X(PMe3) 4 (X = Cl, Br)

The η2-acyl complexes of molybdenum Mo(η2-COCH2CMe3)X(PMe3) 4 (X = Cl (1a), Br (1b)) have been prepared by the action of Mg(CH2CMe3)X on the carbonyl carbonate Mo(CO3)(CO)(PMe3)4. Complex 1 decomposes in solution with dissociation of PMe3. This reaction occurs faster in the presence of small amounts of water (2-3 drops) with formation of the hydroxo species [MoX(CO)(PMe3)2(μ-OH)]2 (X = Cl (2a), Br (2b)). Carbonylation of 1a, at room temperature and pressure, affords successively Mo(η2-COCH2CMe3)Cl(CO)(PMe 3)3 and Mo(η2-COCH2CMe3)Cl(CO)2(PMe 3)2. Finally, the reaction of Mo(CO3)(CO)(PMe3)4 with CH2Cl2 yields the 7-coordinate anionic compound MoCl3(CO)(PMe3)3, which is isolated as the tetramethylphosphonium salt, [PMe4][MoCl3(CO)(PMe3)3] (3). The crystal structure of 1b has been determined by X-ray crystallography. It crystallizes in the orthorhombic space group, P212121, with a = 10.021 (2) A?, b = 16.752 (3) A?, c = 16.855 (5) A?, and Dcalcd = 1.36 g cm-3 for Z = 4. A total of 1098 independent observed [Fo > 5σ(Fo)] reflections were used in the least-squares refinement, which led to a final conventional R value of 0.051. The molybdenum atom has an approximate pentagonal-bipyramidal geometry, the η2-acyl ligand residing in the pentagonal plane. The acyl and bromo ligands are trans; important distances include Mo-Br = 2.687 (5) A?, Mo-C = 2.00 (3) A?, Mo-O = 2.21 (2) A?, and Mo-P = 2.48 (4) A?, average.