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the reaction mixture was heated to reflux for 150 min., and after cooling down to 0° c quenched by careful dropwise addition of water (50 ml).
la mezcla de reacción se calentó a reflujo durante 150 min, y tras enfriarla a 0 oc, se detuvo mediante adición cuidadosa de agua gota a gota (50 ml).
while stirring continuously, add dropwise 2 ml of calcium chloride (4.2) to the total aqueous extract (about 100 ml).
al extracto acuoso total (alrededor de 100 ml) se añaden gota a gota, con agitación continua, 2 ml de cloruro de calcio (4.2).
methyl sulfinyl -ih- benzimidazole-l-yl ethanol 0.01 mol dissolved in pyridine (15 ml) was added dropwise.
se añadió gota a gota [2-[[(4-metoxi-3,5-dimetil-2piridinilmetil]sulfinil] -1h-bencimidazol-1-il]metanol (0,01 moles) disuelto en piridina (15 ml).
for example, if sncl2 is added dropwise into a solution of mercury(ii) chloride, a white precipitate of mercury(i) chloride is first formed; as more sncl2 is added this turns black as metallic mercury is formed.
for example, if sncl2 is added dropwise into a solution of mercury(ii) chloride, a white precipitate of mercury(i) chloride is first formed; as more sncl2 is added this turns black as metallic mercury is formed.