in neat (no solvent) addn. of anhydrous H2SO4 to dry NaH2PO2; shaking the solidified soln. after with abs. alcohol after 2 days;; filtration of Na2SO4; evapn. of alcohol at ambient pressure, then in vacuum; Crystn. on cooling with a freezing mixture;;
参考文献
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, , vol. 138, p. 1216 - 1217