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Ethyl-5-methyl-4-imidazolecarboxylate (emizco) is an important intermediate in the synthesis of pharmacological ac- tive compounds. In this work, there were synthetized and char- acterized the following coordination compounds with emizco: trans-(Co(emizco)2(H2O)2)(NO3)2 1, trans-(Ni(emizco)2(H2O)2)(NO3)2 2, trans-(Cd(emizco)2(H2O)2)(NO3)2 (3) and cis-(Cd(emizco)2Br2) (4). 2D or 3D supramolecular arrangements were stabilized. All nitrate trans octahedral compounds stabilized a 3D supramolecular arrange- ment via hydrogen bonding, throughout the nitrate anions, the ligand and the coordinated water molecules; the cis-octahedral halide com- plex formed a 2D pleated sheet arrangement, by intermolecular π stacking and halide-hydrogen bonding. Resumen. El etil 5-metil-4-imidazolcarboxilato (emizco) es un in- termediario importante en la sintesis de compuestos con activi- dad farmacologica. En el presente trabajo se sintetizaron y carac- terizaron los siguientes compuesto de coordinacion con emizco: trans-(Co(emizco)2(H2O)2)(NO3)2 1, trans-(Ni(emizco)2(H2O)2)(NO3)2 2, trans-(Cd(emizco)2(H2O)2)(NO3)2 (3) y cis-(Cd(emizco)2Br2) (4). Estos compuestos estabilizan estructuras supramoleculares en 2D o 3D; todos los compuestos de nitrato con geometria trans octaedrica estabilizan arreglos en 3D por medio de puentes de hidrogeno entre los iones nitrato, emizco y las moleculas de H2O; mientras que el compuesto de coordinacion del haluro cis octaedrico tiene un arreglo en forma de hoja plegada en 2D, por medio de interacciones intermo- leculares de tipo apilamiento-π y puente de hidrogeno-haluro. Palabras clave: Emizco, cobalto(II), niquel(II), cadmio(II), compues- to de coordinacion, arreglos supramoleculares.

journal of the mexican chemical society

2D and 3D Supramolecular Structures of trans- and cis-Octahedral Coordination Compounds of Ethyl-5-methyl-4-imidazolecarboxylate with Transition Metal Ions