Diverse CdII coordination complexes derived from bromide isophthalic acid binding with auxiliary N-donor ligands

Four 3D CdII coordination complexes on the basis of 4-bromoisophthalic acid (4-Br-H2ip) and two types of flexible (bbi, bbt) and semiflexible (bix, btx) N-donor ligands are prepared. They displayed diverse topology structures of 66 (1), 412 (2) and 4·38 (3−4), depending on the configuration of the 4-connected metal node, the coordination mode of the 4-Br-H2ip, the coordination ability and conformationally flexibility of the N-donor auxiliary ligand.