Producción Científica Profesorado

Synthesis and structure of Zn(II) and Cu(II) complexes derived from 2-(aminomethyl)benzimidazole and glycine.

Tlahuextl Romero, Angela Margarita


Synthesis and structure of Zn(II) and Cu(II) complexes derived from 2-(aminomethyl)benzimidazole and glycine. Martha Falcón-León, Hugo Tlahuext,* Víctor Lechuga-Islas, Margarita Tlahuextl, Francisco J. Martínez-Martínez, Herbert Höpf and Antonio R. Tapia-Benavides*. Journal of Coordination Chemistry, Vol. 67, No. 11, 1873?1887 (2014), Taylor & Francis, ENGLAND, ISSN: 0095-8972, ISSN electrónico: 1029-0389 (online 01/07/2014), Número IDS: AM8TO,. DOI: 10.1080/00958972.2014.930139,


Reactions of 2-(aminomethyl)benzimidazole di-hydrochloride (12HCl) and glycine with 3Zn(OH)22ZnCO3 or Cu(OAc)2H2O led to the synthesis of the quaternary coordination complexes 2 and 3. X-ray diffraction showed that these complexes are composed of 2a = [Zn(L)Cl(L?)] and 2b = [Zn(L)(H2O)2(L?)], and of 3a = [Cu(L)(H2O)0.25Cl(L?)] and 3b = [Cu(L)(H2O)1.5(L?)], respectively, where L?=?2-(aminomethyl)benzimidazole and L??=?glycinate. Zn(II) in 2a has an intermediate geometry between a square-pyramid and a trigonal bipyramid structure. However, the geometry about the metal ion of units 2b, 3a, and 3b is distorted octahedral. Moreover, the supramolecular structures for 2 and 3 were assembled through N?H?O and O?H?Cl hydrogen bonds. In these complexes, H2O and N?H groups serve as proton donors, whereas chloride and C=O groups serve as proton acceptors. Also ??? stacking interactions between aromatic rings contribute to the stabilization of the supramolecular structure of 2 and 3. The Zn and Cu complexes were studied by infrared and Raman spectroscopy, which indicated that 2 and 3 have similar molecular structures in the solid state. Ultrasound activation at the end of the reaction was necessary to yield 2.

Producto de Investigación

Artículos relacionados

Synthesis and structural studies of new N-(p-toluenesulfonyl)amino acid o-phenolamides

Structural study and antioxidant activity determination of (2E)-N-[2-(morpholin-4-yl)ethyl]-cinnamid...

Synthesis of Zn compounds derived from 1H-benzimidazol-2-ylmethanamine

1,4,7,8-Triazaborabicyclooctanesfirst examples of new boron heterocycles [1,2]

trans-Bis[2-(aminomethyl)-1H-benzimidazole-2N2,N3]aquacopper(II) dichloride dihydrate

1 H, 13C, 15N, 2D and variable temperature NMR study of the role of hydrogen bonding in the structur...

Structural studies of spiroarsoranes derived from 2-aminophenols

ChemInform Abstract: Syntheses of N-Substituted 2,5-Piperazindiones.

Chlorination reactions of ephedrines revisited. Stereochemistry and functional groups effect on the ...

Acid-base equilibrium studies of 2-(aminomethyl)benzimidazolein aqueous solution