G SOH aG NH, CH3O CH3 H CI Br I NO pKn1046102110.1710.09.389.359307.15 酸性增强 OH NO O p NO K8.287.177.15 pOrganic Chemistry Organic Chemistry Xiamen Xiamen University University G OH G p Ka NH 2 CH 3O C H 3 H Cl Br I NO 2 10.46 10.21 10.17 10.0 9.38 9.35 9.30 7.15 酸性增强 OH NO 2 p Ka NO 2 m - o - p- 8.28 7.17 7.15