卤代烷与硫脲生成$-烷基异硫脲盐；再水解成硫醇和尿素 Rx+SCN距 R-S-C-N五 NH2 +NH2X · RSH+H2NCONH 碱 硫醚 RS+R'X RSR'+X 2RX+Na2S→R-S-R+2NaX 硫醇与烯烃在过氧化物存在下自由基加成制硫醚 硫酚 CoH SOCI HSOC.HsSH 硫醚 碱 RS- + R’X RSR’ + X- 硫酚 C6H5SO2Cl C6H5SH Zn，H2SO4 RX + S=C-NH2 NH2 R-S-C-NH2 +NH2X - OH - H2O RSH +H2NCONH2 卤代烷与硫脲生成S-烷基异硫脲盐；再水解成硫醇和尿素 2RX+ Na2S R-S-R+ 2NaX 硫醇与烯烃在过氧化物存在下自由基加成制硫醚