“…Each Cd1 ion is six-coordinated and located in a distorted octahedral CdN 2 O4 coordination environment formed by two N atoms (N1 and N2#1) and two O atoms (O4#1 and O5) from two H 2 hmIDC 2− anions and by two water molecules (O6 and O7). The Cd-O bond lengths range from 2.357(2) to 2.535(2) Å and the Cd-N bond lengths are 2.207(2) and 2.254(2) Å, respectively; these values are within the normal ranges and close to those reported in other Cd(II) complexes [13][14][15]. Cd(II) ions are linked by H 2 hmIDC 2− ligand into one-dimensional chains that run along the c axis.…”
“…Each Cd1 ion is six-coordinated and located in a distorted octahedral CdN 2 O4 coordination environment formed by two N atoms (N1 and N2#1) and two O atoms (O4#1 and O5) from two H 2 hmIDC 2− anions and by two water molecules (O6 and O7). The Cd-O bond lengths range from 2.357(2) to 2.535(2) Å and the Cd-N bond lengths are 2.207(2) and 2.254(2) Å, respectively; these values are within the normal ranges and close to those reported in other Cd(II) complexes [13][14][15]. Cd(II) ions are linked by H 2 hmIDC 2− ligand into one-dimensional chains that run along the c axis.…”
“…Furthermore, relatively strong π-π interactions can be found between the tetrazole rings of adjacent layers. In complex 2, the distance between two adjacent centroids is 3.4909(10) Å, which is within the normal range for π-π interactions [35][36][37]. Similar to complex 2, the centroid-centroid distance is 3.4977(12) Å in complex 1.…”
Imidazole and tetrazole derivatives are widely used as clinical drugs since they possess a variety of pharmaceutical function. Zinc and iron are essential trace elements of the human body, with less toxicity and good biocompatibility. In this paper, two new essential metal mononuclear complexes [M(H2tmidc)2(H2O)2]·2H2O (M = Zn (1), Fe (2)) were synthesized through the reaction of 2-((1H-tetrazol-1-yl)methylene)-1H-imidazole-4,5-dicarboxylic acid (H3tmidc) and ZnSO4·7H2O or FeSO4·7H2O. The crystal structures were determined by means of the X-ray single crystal diffraction technique. Results from fluorescence investigations show that both complexes could interact with BSA as well as HSA through the static quenching mechanism. van der Waals forces and hydrogen bonds play important roles in the interaction of complexes and BSA/HSA since both ΔH and ΔS values are negative. The results of molecular docking are consistent with those in experimental studies. Furthermore, the anticancer activity of H3tmidc and both complexes against Eca-109 were preliminarily evaluated and the results show that both complexes have better anticancer activity than the corresponding ligand H3tmidc.
“…There are O-H … O intramolecular hydrogen bonds between carboxyl and carboxylate groups, and O-H … O, O-H … N and N-H … O inter molecular hydrogen bonds involving carboxylate groups, imidazole ring, tetrazole ring, coordination water molecules and solvent water molecules. In addition, there are π-π stacking interactions between imidazole rings of adjacent chains with a centroid-centroid distance of 3.5699(7) Å, which is in the range for common π-π interactions [15][16][17]. Adjacent chains are linked by the aforementioned hydrogen bonds and π-π interactions, to a three-dimensional architecture in the solid state.…”
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