Mixed‐ligand Copper(II) Complexes with N‐isopropyl‐iminodiacetato(2‐) and C‐phenyl‐imidazole Ligands. Crystal Structures of H 2 iPIDA, [Cu(iPIDA)(H2ϕim)(H 2 O)]·3H 2 O and [Cu(iPIDA)(H5ϕim)] n

The crystal of the N‐isopropyl‐iminodiacetic acid ( 1 ) consists of a 3D H‐bonded framework where the zwitterion (H 2 iPIDA ± ) is intra‐stabilized by one N + ‐H···O interaction and both carboxyl are half‐protonated and involved in linear O‐H···O inter‐molecular bridges of 2.46 Å. The mixed‐ligand complexes [Cu(iPIDA)(H2ϕim)(H 2 O)]·3H 2 O ( 2 ) and [Cu(iPIDA)(H5ϕim)] n ( 3 ) have also been synthesized and studied by thermal, spectral, magnetic and X‐ray diffraction methods. Both complexes exhibit a square base pyramidal coordination, type 4+1. Compound 3 is the less steric hindered 'remote' isomer, with H5ϕim instead of H4ϕim.