Metal complexes of 3-acetamido-5-methylpyrazole |
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Authors: | Yingshen Lu |
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Institution: | Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, Canada S7N 5C9 |
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Abstract: | In this paper, we present the complete synthesis of the 3-Acetamido-5-methylpyrazole (3-Ac-AMP) from 3-amino-5-methylpyrazole and acetic acid anhydride, including its full spectroscopic characterization. The solid-state structure shows extensive H-bonding involving the acyl and pyrazole moieties. Upon coordination to Co2+, Zn2+, and Cd2+, the system adopts a geometry that allows it to bind to metal centres as a O,N-chelate. 3-Ac-AMP coordination to Zn and Cd was monitored by 1H NMR showing the formation of presumably tetrahedral 2:1 complexes. In the solid state, Co and Zn complexes are centrosymmetric and octahedral having two 3-Ac-AMP ligands in the equatorial plane and two methanol ligands occupying axial positions. The systems form a layered structure in which the ClO4 − counter ion links the layers via H-bonding. |
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Keywords: | Pyrazole Chelate Complex Cobalt Zinc Cadmium Structure |
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