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Title: Synthesis & complexation of tripodal tris (1,2,3-triazol-5-ylidene) mesoionic carbene ligands
Authors: Laxmi, Shoba
Keywords: DRNTU::Science::Chemistry::Inorganic chemistry::Metals
DRNTU::Science::Chemistry::Inorganic chemistry::Synthesis
Issue Date: 2018
Abstract: Herein, the synthesis and coordination of a new 1,2,3-triazol-5-ylidene ligand system using cobalt salts to form an imido cobalt complex. 1,2,3-triazol-5-ylidenes are a special class of mesoionic carbenes (MICs) synthesised from triazoles, which are conveniently obtained through [2+3] “click” cycloaddition reactions. Isolation of the target tris[(1,2,3-triazol-5-ylidene)methyl] amine ligand precursors, H3Ln(X)3, in high yield has proven to be difficult. The free carbene, Ln formed was found to be stable at -80°C based on low temperature 1H NMR studies done. Two different complexation routes, silver transmetalation and direct metalation were explored. Sufficient quantities of cobalt(II) complex, [CoL1(CH3CN)][OTf]2 was successfully synthesised via the direct metalation. [CoL1(CH3CN)][OTf]2 synthesised was characterised using 1H NMR, cyclic voltammetry and X-Ray crystallography.
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Student Reports (FYP/IA/PA/PI)

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Exploration into the synthesis of tripodal Tris(1,2,3-triazol-5-ylidene) Mesoionic Carbene Ligands and using them to carry out complexation with cobalt salts to form cobalt complex.2.47 MBAdobe PDFView/Open

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