Abstract
[1457-42-7] C4H4N2O (MW 96.09) 1S/C4H4N2O/c7-6-4-2-1-3-5-6/h1-4H InChIKey = GAJBWMUZVXJIBO-UHFFFAOYSA-N (activated form of pyridazine, amenable to nucleophilic attack and direct functionalization) Alternate Names: pyridazine N-oxide, pyridazine oxide. Physical Data: mp 151 °C. Solubility: soluble in most polar common organic solvents. Mild solubility in water. Form Supplied in: available as beige powder from many chemical providers. Analysis of Reagent Purity: 1H NMR (300 MHz, CDCl3) δ 8.59 (1H, d, J = 6.6 Hz), 8.33 (1H, d, J = 6.6 Hz), 7.92–7.87 (1H, m), 7.29 (1H, dd, J = 5.7, 6.6 Hz). 13C NMR (75 MHz, CDCl3) δ 149.8, 133.9, 133.6, 115.9. Handling, Storage, and Precautions: extensive toxicity data are not known. Reagent should be handled in a laboratory fumehood with appropriate personal protection equipment (laboratory coat, gloves, and glasses). In case of contact with eyes, rinse with copious amounts of water. Must be disposed of as hazardous waste.
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