| 释义 |
gi·rard reagent
\jə̇ˈrärd-\ noun
or gi·rard's reagent \-dz-\
Usage: usually capitalized G
Etymology: after André Girard, 20th century French chemist
: any of several hydrazides that contain a quaternary ammonium radical and are useful especially in separating aldehydes or ketones (as some steroid hormones) from mixtures by forming soluble hydrazones: as
a. : a crystalline compound (CH3)3N(Cl)CH2CONHNH2 derived from trimethylamine or betaine — called also Girard T reagent
b. : a crystalline compound C5H5N(Cl)CH2CONHNH2 derived from pyridine — called also Girard P reagent |