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- Provide the reagents necessary to carry out the following conversion. Explain briefly what each step is doing. OHMelamine, used as a fire retardant and a component of the writing surface of white boards, can be prepared from s-trichlorotriazine through a series of SNAr reactions with ammonia. The first substitution takes place rapidly at room temperature. The second substitution takes place near 100 °C, and the third substitution requires even higher temperature and pressure. Provide an explanation fatr this reactivity.Provide the reagents necessary to carry out the following conversion. OH