Alkali metal salts of formazanate ligands: diverse coordination modes as a result of the nitrogen-rich [NNCNN] ligand backbone
| Autor: | Mu-Chieh Chang, Edwin Otten, Raquel Travieso-Puente |
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| Přispěvatelé: | Molecular Inorganic Chemistry, Stratingh Institute of Chemistry |
| Rok vydání: | 2014 |
| Předmět: |
STRUCTURAL-CHARACTERIZATION
chemistry.chemical_classification CATALYSIS Ligand Inorganic chemistry Salt (chemistry) chemistry.chemical_element BORON DIFLUORIDE COMPLEXES Zinc Ring (chemistry) Alkali metal Catalysis Coordination complex 3-NITROFORMAZAN Inorganic Chemistry REDUCTION Crystallography chemistry CHEMISTRY Chelation REDOX-ACTIVE LIGANDS 3-CYANOFORMAZAN POLYMER NETWORKS BETA-DIKETIMINATE |
| Zdroj: | Dalton Transactions, 43(48), 18035-18041. ROYAL SOC CHEMISTRY |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/c4dt02578d |
| Popis: | Alkali metal salts of redox-active formazanate ligands were prepared, and their structures in the solid-state and in solution are determined. The nitrogen-rich [NNCNN] backbone of formazanates results in a varied coordination chemistry, with both the internal and terminal nitrogen atoms available for bonding with the alkali metal. The potassium salt K[PhNNC(p-tol)NNPh]center dot 2THF (1-K) is dimeric in the solid state and even in THF solution, as a result of the K atom bridging via interaction with a terminal N atom and the aromatic ring of a second unit. Conversely, for the compounds Na[MesNNC(CN)NNMes]center dot 2THF (2-Na) and Na[PhNNC(Bu-t)NNPh] (3-Na) polymeric and hexameric structures are found in the solid state respectively. The preference for binding the alkali metal through internal N atoms (1-K and 2-Na) to give a 4-membered chelate, or via internal/external N atoms (5-membered chelate in 3-Na), contrasts with the 6-membered chelate mode observed in our recently reported formazanate zinc complexes. |
| Databáze: | OpenAIRE |
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