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The diacylhydrazines, also known as bisacylhydrazines (BAHs) or dibenzoylhydrazines are appropriately substituted derivatives of dibenzoyl hydrazine. [2] They do not immediately kill the insect, but produces premature unsuccessful moulting, which then causes the death of the insect. BAHs thus belong to the class of insect growth regulators.
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Hydrazines (R 2 N−NR 2) are a class of chemical compounds with two nitrogen atoms linked via a covalent bond and which carry from one up to four alkyl or aryl substituents. . Hydrazines can be considered as derivatives of the inorganic hydrazine (H 2 N−NH 2), in which one or more hydrogen atoms have been replaced by hydrocarbon grou
In the common names of such salts, the cation is often called "hydrazine", as in "hydrazine sulfate" for hydrazinium hydrogensulfate. The terms "hydrazinium" and "hydrazine" may also be used for the doubly protonated cation [N 2 H 6] 2+, more properly called hydrazinediium or hydrazinium(2+). This cation has an ethane-like structure ([H 3 N− ...
Hydrazine is an inorganic compound with the chemical formula N 2 H 4.It is a simple pnictogen hydride, and is a colourless flammable liquid with an ammonia-like odour.Hydrazine is highly hazardous unless handled in solution as, for example, hydrazine hydrate (N 2 H 4 ·xH 2 O).
Industrially the compound is produced by treatment of urea with hydrazine: [3] OC(NH 2) 2 + 2 N 2 H 4 → OC(N 2 H 3) 2 + 2 NH 3. It can also be prepared by reactions of other C1-precursors with hydrazine, such as carbonate esters. [2] It can be prepared from phosgene, but this route cogenerates the hydrazinium salt [N 2 H 5]Cl and results in ...
Hydrazinium azide decomposes explosively into hydrazine, ammonia, and nitrogen gas: [3] 12 N 5 H 5 → 3 N 2 H 4 + 16 NH 3 + 19 N 2. Crystallization with an equimolar amount hydrazine yields the solid hydrazinium azide hydrazinate, [N 2 H + 5] [N − 3] · [N 2 H 4], or N 7 H 9, as monoclinic crystals. This compound is less hygroscopic and less ...
Ketazines are also important intermediates in the industrial production of hydrazine hydrate by the peroxide process. [3] In the presence of an oxidant, ammonia and ketones react to give hydrazine via ketazine: 2 Me(Et)C=O + 2 NH 3 + H 2 O 2 → Me(Et)C=NN=C(Et)Me + 2 H 2 O. The ketazine can be hydrolyzed to the hydrazine and regenerate the ketone: