B.反应机理 R-C÷OH+H-O-R RCOOR'+ho 1, 2 ROH R-C-0÷H+H-0÷R= RCOOR+H1,O3ROH a)酰氧断键 H RCOOH CHs0 H- RCOoC2H5 H,o CH CH RCooH + HO RCOO h +hoB. 反应机理 R－C－OH ＋ H－O－R' RCOOR' + H2O 1 , 2 R'OH ° ° O R－C－O－H ＋ H－O－R' RCOOR' + H2O 3 R'OH ° O a) 酰氧断键 RCOO18C2H5 RCOOH + C2H5O18H + H2O H+ RCOOH + + H2O H+ HO H CH3 C2H5 RCOO H CH3 C2H5