And if there is a hydroxyl in ortho position of carboxyl, the oxygen of hydroxyl and carboxyl in ligand are bound to ti to form hexatomic cyclic compound.
而羧基邻位有酚羟基存在时，则配体以双齿形式与钛配位形成二茂钛六元环状化合物。
2
The cysteine in the clay mineral existed in the forms of zwitterion and anion, the O and S in it chelated zinc cation to form configuration of hexatomic ring.