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Source of material Experimental detailsThe hydrogen atoms were positioned geometrically and refined using a riding model, with d(N-H) = 0.86 Å and U iso (H) = 1.2 U eq (N), d(C-H) = 0.93-0.97 Å and U iso (H) = 1.2-1.5 U eq (C). DiscussionIn recent decades, the rational design and synthesis of metal-organic frameworks (MOFs) have attracted significant interest due to their intriguing structures and potential application in many fields, such as nonlinear optics, magnetism, catalytisis, adsorption, ion exchange, luminescence [1][2][3]. In the formation of complexes, the structure of the target product is influenced by several factors. = phthalate, immb = 2-((1H-imidazol-1-yl)-6-methyl)-1H-benzoimidazole) bearing N and O-donors. The asymmetric unit contains one Cd(II) cation, one immb molecule and one phthalate anion. The Cd(II) ion is in a six coordination environment, and is connected with two nitrogen atoms (N1 and N4 #2 ) from two immb ligands, four oxygen atoms (O1, O2, O3 #1 , O4 #1 ) from two carboxylates with chelating mode (symmetry codes: #1: -x+1, -y+2, -z+1; #2: -x+2, -y+1, -z+1). Most of the bond angles around the central Cd(II) ion deviate dramatically from the ideal angles of 90°or 180°expected for an octahedral geometry. The Cd-N and Cd-O distances are similar to those in reported Cd(II) complexes [5]. The Cd(II) ions are linked by phthalates and immb ligands alternately leading to 1D chains. Adjacent chains are connected by N-H···O hydrogen bonds between benzimidazole ring and carboxylate forming the 2D layer structure.