Methyl Triethyl Ammonium Tetrafluoroborate

Methyl triethyl ammonium tetrafluoroborate, also known as MTEB, is a chemical compound with the molecular formula C₇H₁₈BF₄N. It can be synthesized by reacting triethylamine with methyl iodide in the presence of acetonitrile or dimethylformamide to form methyl triethylammonium iodide. It is a salt that is commonly used as a catalyst in organic synthesis reactions, particularly in the preparation of various organic compounds such as pharmaceuticals, agrochemicals, and polymers. It is a colourless or light yellow crystalline solid that is soluble in water and many organic solvents. It has several unique properties that make it a versatile compound that is useful in a wide range of applications in the chemical industry.