Metal−Metal Interactions in Stacked Mononuclear and Dinuclear Rhodium 2,2′-Biimidazole Carbonyl Complexes
| Autor: | Larisa Oresmaa, Matti Haukka, Pipsa Hirva, Elina Laurila, Mika Niskanen |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Crystal Growth & Design. 10:3775-3786 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg100606f |
| Popis: | Noncovalent metal−metal interactions in the solid state were studied by investigating the stacking of the cationic mononuclear [Rh(H2bim)(CO)2]+ (H2bim = 2,2′-biimidazole) and neutral dinuclear [Rh2(R2bim)Cl2(CO)4] (R = Me, methyl or Bn, benzyl) complexes. In both cases, the d8 rhodium atoms possessed square planar coordination geometries. The cationic [Rh(H2bim)(CO)2]+ complexes with a chelating H2bim ligand all formed polymeric stacks with variable Rh···Rh distances (3.2743(3)−3.430(6) A), depending on the counter-anions. In the solid state, the neutral dinuclear complexes with bridging Bn2bim formed isolated complexes with no metal−metal interactions between the dinuclear [Rh2(Bn2bim)Cl2(CO)4] motifs. The use of the Me2bim ligand led to a tetranuclear complex [Rh2(Me2bim)Cl2(CO)4]2 with an intermolecular Rh···Rh distance of 3.4104(7) A. A neutral polymeric stack of [Rh2(Me2bim)Cl2(CO)4]n was obtained only in crystals with ethanol of crystallization. The effect of the intermolecular metal−metal interact... |
| Databáze: | OpenAIRE |
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