1)形成内盐 R-CH-COOH-R-CH-COO 2)成盐 R一CH-COOH+HCl R—CH-COOH+C *NH 2 3 R—CH-COOH+NaOH零 R一CH-COO+Na 2 2 99 R CH COOH NH2 R CH COO NH3 1）形成内盐 2）成盐 R CH COOH NH2 + HCl R CH COOH NH3 + + Cl - R CH COOH NH2 + R CH COO NH2 NaOH + - Na +