Pakati
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1,4-Phthalaldehyde
Wedzera 6.0 g yesodium sulfide, 2.7 g yesulfur powder, 5 g yesodium hydroxide uye 60 ml yemvura mu 250 ml matatu ane mitsipa flask ine reflux condenser uye inomutsa mudziyo, uye simudza tembiricha kusvika 80.℃pasi pekubvongodza.Iyo Yero sulfur poda inonyungudika, uye mhinduro inoshanduka tsvuku.Mushure mekudzokorora kwe1 h, yakasviba tsvuku sodium polysulfide mhinduro inowanikwa.
