ジブロムフルオレスセインの水銀化合物に関する研究 (第1報)

ジブロムフルオレスセインの水銀化反応について

抄録

Mercuration of dibromofluorescein by heating a mixture of dibromofluorescein and mercury acetate in 1:4 ratio in acetic acid showed that the pH of the medium greatly affected the amount of mercury introduced, besides the length of heating. At pH below 3, the mercury introduced was liable to liberate and the half-masked mercury precipitated out as metallic mercury. At pH over 6, dibromofluorescein was oxidized by mercury acetate and a part of bromine was liberated. At above pH 7, mercuration no longer proceeded and the amount of liberation of black mercury increased. The reaction proceeded most smoothly at around pH 4 and up to 1.5 moles of mercury could be introduced. However, adjustment of molar ratio, heating time, and pH of the medium failed to effect introduction of two moles of mercury by this method to form a dimercury compound.