Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries
The four- and five-coordinate complexes [(CNC)NiX2] (X = Cl, Br, I), [(CNC)NiX]PF6 (X = Cl,Br) and [(CNC)NiCl]ClH2O have been isolated, where CNC is the bis(N-butylbenzimidazolin-2-ylidene)-2,6-pyridine pincer ligand. A five-coordinate geometry is rare for this class of complex.Where amenable, the c...
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| Format: | Journal Article |
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The Royal Society of Chemistry
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/6115 |
| _version_ | 1848744983816830976 |
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| author | Brown, David Skelton, B. |
| author_facet | Brown, David Skelton, B. |
| author_sort | Brown, David |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The four- and five-coordinate complexes [(CNC)NiX2] (X = Cl, Br, I), [(CNC)NiX]PF6 (X = Cl,Br) and [(CNC)NiCl]ClH2O have been isolated, where CNC is the bis(N-butylbenzimidazolin-2-ylidene)-2,6-pyridine pincer ligand. A five-coordinate geometry is rare for this class of complex.Where amenable, the complexes have been structurally characterised by single crystal X-raydiffraction studies and in solution by NMR, UV-vis and MS studies. The five-coordinate dibromocomplex [(CNC)NiBr2] is readily prepared on the gram-scale from the benzimidazolium saltprecursor and Ni(OAc)24H2O in DMSO without the exclusion of air. Halide exchange and saltmetathesis reactions using [(CNC)NiBr2] afford the other four- and five-coordinate complexes.[(CNC)NiBr2] displays very low solubility, and upon dissolution affords solutions of the fourcoordinate[(CNC)NiBr]+. Factors that influence the formation of four- or five-coordinatecomplexes with this ligand class are discussed. |
| first_indexed | 2025-11-14T06:10:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-6115 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:10:08Z |
| publishDate | 2011 |
| publisher | The Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-61152017-09-13T16:01:43Z Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries Brown, David Skelton, B. The four- and five-coordinate complexes [(CNC)NiX2] (X = Cl, Br, I), [(CNC)NiX]PF6 (X = Cl,Br) and [(CNC)NiCl]ClH2O have been isolated, where CNC is the bis(N-butylbenzimidazolin-2-ylidene)-2,6-pyridine pincer ligand. A five-coordinate geometry is rare for this class of complex.Where amenable, the complexes have been structurally characterised by single crystal X-raydiffraction studies and in solution by NMR, UV-vis and MS studies. The five-coordinate dibromocomplex [(CNC)NiBr2] is readily prepared on the gram-scale from the benzimidazolium saltprecursor and Ni(OAc)24H2O in DMSO without the exclusion of air. Halide exchange and saltmetathesis reactions using [(CNC)NiBr2] afford the other four- and five-coordinate complexes.[(CNC)NiBr2] displays very low solubility, and upon dissolution affords solutions of the fourcoordinate[(CNC)NiBr]+. Factors that influence the formation of four- or five-coordinatecomplexes with this ligand class are discussed. 2011 Journal Article http://hdl.handle.net/20.500.11937/6115 10.1039/C1DT10928F The Royal Society of Chemistry fulltext |
| spellingShingle | Brown, David Skelton, B. Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| title | Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| title_full | Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| title_fullStr | Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| title_full_unstemmed | Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| title_short | Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| title_sort | nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries |
| url | http://hdl.handle.net/20.500.11937/6115 |