One‐Pot Hydrothermal Synthesis of Two New Copper(II) Complexes with 4‐Carboxyphenoxy Acetic Acid

The one‐pot hydrothermal reaction of CuCl 2 with H 2 CPOA and 4,4′‐bpy results in two new coordination polymers, [Cu(CPOA)(4,4′‐bpy)(H 2 O) 2 ]·1.5H 2 O ( 1 ) and [Cu 2 (HCPOA) 4 (4,4′‐bpy) 4 ] ( 2 ) (H 2 CPOA4‐carboxyphenoxy acetic acid, 4,4′‐bpy4,4′‐bipyridine) since CPOA 2− anions reach equilibrium with HCPOA − anions in the reaction system. The crystal structure of 1 shows a triple interpenetration CdSO 4 ‐like net with 1D channel, in which lattice water molecules are located. Complex 2 is a ladder‐like 1D double chain structure assembled through coordination bonds and O–H···N hydrogen bonds.