RONa+RX\mathrm{RONa}+\mathrm{RX}RONa+RX
ROH+RCOOH\mathrm{ROH}+\mathrm{RCOOH}ROH+RCOOH
RMgX+H+\mathrm{RMgX}+\mathrm{H}^{+}RMgX+H+
RONa \text { RONa } RONa