Nitrogen–halogen compounds

'''N-Bromosuccinimide or NBS''' is a chemical reagent used in radical substitution, electrophilic addition, and electrophilic substitution reactions in organic chemistry. NBS can be a convenient source of Br•, the bromine radical.

Chloramine-T is the organic compound with the formula CH3C6H4SO2NClNa. Both the anhydrous salt and its trihydrate are known. Both are white powders. Chloramine-T is used as a reagent in organic synthesis. It is commonly used as cyclizing agent in the synthesis of aziridine, oxadiazole, isoxazole and pyrazoles. It's inexpensive, has low toxicity and acts as a oxidizing agent. In addition, it also acts as a source of nitrogen anions and electrophilic cations. It may undergo degradation on long term exposure to atmosphere such that care must be taken during its storage.

'''N-Chlorosuccinimide (NCS''') is the organic compound with the formula C2H4(CO)2NCl. This white solid is used for chlorinations. It is also used as a mild oxidant. NCS is related to succinimide, but with N–Cl in place of N–H. The N–Cl bond is highly reactive, and NCS functions as a source of "Cl+".

The tetrafluoroammonium cation (also known as perfluoroammonium) is a positively charged polyatomic ion with chemical formula . It is equivalent to the ammonium ion where the hydrogen atoms surrounding the central nitrogen atom have been replaced by fluorine. Tetrafluoroammonium ion is isoelectronic with tetrafluoromethane , trifluoramine oxide , tetrafluoroborate anion and the tetrafluoroberyllate anion.

Chloramines refer to derivatives of ammonia and organic amines wherein one or more N−H bonds have been replaced by N−Cl bonds. Two classes of compounds are considered: inorganic chloramines and organic chloramines. Chloramines are the most widely used members of the halamines.

'''N-Iodosuccinimide (NIS''') is a reagent used in organic chemistry for the iodination of alkenes and as a mild oxidant.