Definition of diazomethane in English:

diazomethane

noun

Chemistry
  • [mass noun] A poisonous, reactive yellow gas used as a methylating agent in chemical synthesis.

    • ‘Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane.’
    • ‘The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms.’
    • ‘Caution: the reaction sequence should be carried out behind a blast shield and in the hood because diazomethane is a vapor.’
    • ‘With diazomethane itself, you can watch its color disappear and know that something's happening.’
    • ‘Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA.’

Origin

Late 19th century: from diazo- (indicating the presence of two nitrogen atoms) + methane.

Pronunciation:

diazomethane

/dʌɪˌeɪzəʊˈmiːθeɪn//dʌɪˌazəʊˈmiːθeɪn/