Synthesis and Characterization of Cross-Bridged Cyclams and Pendant-Armed Derivatives and Structural Studies of Their Copper(II) Complexes
| Autor: | Daniel C. Hill, Ilia A. Guzei,§,# and, Edward H. Wong, § Kin-Chung Lam, David P. Reed, Joseph C. Calabrese, Gary R. Weisman, Jeffrey S. Condon, Maureen A. Fagan, Mark E. Rogers, Arnold L. Rheingold |
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| Rok vydání: | 2000 |
| Předmět: |
Stereochemistry
Ligand chemistry.chemical_element General Chemistry Biochemistry Copper Catalysis Square pyramidal molecular geometry Metal chemistry.chemical_compound Crystallography Trigonal bipyramidal molecular geometry Colloid and Surface Chemistry chemistry Octahedron visual_art Cyclam visual_art.visual_art_medium Lone pair |
| Zdroj: | Journal of the American Chemical Society. 122:10561-10572 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja001295j |
| Popis: | A series of 1,4,8,11-tetraazabicyclo[6.6.2]hexadecane ligands, including the parent compound, N,N‘-dialkyl variants, and the first N,N‘-di-pendant-arm derivatives have been synthesized by a short, efficient, and conceptually novel approach. Their copper(II) complexes have been prepared, and four of these were structurally characterized by X-ray diffraction. In all four complexes, the cross-bridged tetraamine ligand was found to be cis-folded, coordinating the metal cation within its molecular cleft using all four nitrogen lone pairs. Geometries intermediate between idealized square pyramidal and trigonal bipyramidal coordination were found for three of the complexes, whereas a distorted octahedral copper coordination was found for the complex of a di-pendant-arm cross-bridged cyclam. |
| Databáze: | OpenAIRE |
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