Table 1.

Classification of DES. Adapted from [48].

Type	Formula	Terms
Type I	Cat+X−zMClx	M = Zn, Sn, Fe, Al, Ga, In
Type II	Cat+X−zMClx∙yH2O	M = Cr, Co, Cu, Ni, Fe
Type III	Cat+X−zRZ	Z = CONH2, COOH, OH
Type IV	MClx + RZ = MClx−1+∙RZ + MClx+1−	M = Al, Zn Z = CONH2, OH