Four NiII complexes with the new cyclam-methylimidazole ligand 1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11-tetraazacyclotetradecane
Although it has not proved possible to crystallize the newly prepared cyclam-methylimidazole ligand 1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11- tetra-aza-cyclo-tetra-decane (L Im1), the trans and cis isomers of an NiII complex, namely trans-aqua-{1-[(1-methyl-1H-imidazol-2-yl) methyl]-1,4,8,11-t...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/67728 |
| Acceso en línea: | http://hdl.handle.net/11336/67728 |
| Access Level: | acceso abierto |
| Palabra clave: | Cyclam Nickel Pendant-Arm Isomerism https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| Sumario: | Although it has not proved possible to crystallize the newly prepared cyclam-methylimidazole ligand 1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11- tetra-aza-cyclo-tetra-decane (L Im1), the trans and cis isomers of an NiII complex, namely trans-aqua-{1-[(1-methyl-1H-imidazol-2-yl) methyl]-1,4,8,11-tetra-aza-cyclo-tetra-decane}nickel(II) bis-(perchlorate) mono-hydrate, [Ni(C15H30N6)(H 2O)](ClO4)2·H2O, (1), and cis-aqua-{1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11-tetraaza-cyclo-tetra- decane}nickel(II) bis-(perchlorate), [Ni(C15H30N 6)(H2O)](ClO4)2, (2), have been prepared and structurally characterized. At different stages of the crystallization and thermal treatment from which (1) and (2) were obtained, a further two compounds were isolated in crystalline form and their structures also analysed, namely trans-{1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11- tetra-aza-cyclo-tetra-decane}(perchlorato)nickel(II) perchlorate, [Ni(ClO 4)(C15H30N6)]ClO4, (3), and cis-{1,8-bis-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11-tetra-aza-cyclo- tetra-decane}nickel(II) bis-(perchlorate) 0.24-hy-drate, [Ni(C 20H36N6)](ClO4)2· 0.24H2O, (4); the 1,8-bis-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8, 11-tetra-azacyclo-tetra-decane ligand is a minor side product, probably formed in trace amounts in the synthesis of LIm1. The configurations of the cyclam macrocycles in the complexes have been analysed and the structures are compared with analogues from the literature. © 2012 International Union of Crystallography. |
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