Diglyme

Diglyme, or bis(2-methoxyethyl) ether, is a solvent with a high boiling point. It is an organic compound which is the dimethyl ether of diethylene glycol. (The name 'diglyme' is a portmanteau of 'diglycol methyl ether.') It is a clear, colorless liquid with a slight ether-like odor. It is miscible with water, alcohols, diethyl ether, and hydrocarbon solvents. It is prepared by a reaction of dimethyl ether and ethylene oxide over an acid catalyst. Diglyme, or bis(2-methoxyethyl) ether, is a solvent with a high boiling point. It is an organic compound which is the dimethyl ether of diethylene glycol. (The name 'diglyme' is a portmanteau of 'diglycol methyl ether.') It is a clear, colorless liquid with a slight ether-like odor. It is miscible with water, alcohols, diethyl ether, and hydrocarbon solvents. It is prepared by a reaction of dimethyl ether and ethylene oxide over an acid catalyst. Its stability, even at high pH values, makes it an excellent solvent for reactions with strong bases or reactions that require high temperatures. Diglyme is mainly used as a solvent. It serves as a chelate for alkali metal cations, leaving anions more active. Therefore, reactions involving organometallic reagents, such as Grignard reactions or metal hydride reductions, may have significantly enhanced reaction rates. Diglyme is also used as a solvent in hydroboration reactions with diborane.