9,10-Dichloroanthracene

9,10-Dichloroanthracene is an organic compound with the molecular formula Cl2C=CC=CCl2. It is a chlorinated aromatic hydrocarbon with two adjacent chlorine atoms. The electronic excitations of 9,10-dichloroanthracene are dominated by a triplet state that has a lifetime of about 1 nanosecond. This species exhibits fluorescence at room temperature and emits light in the visible region of the electromagnetic spectrum. The molecule can undergo reactions with amines to form benzenediamine derivatives, which are useful in supramolecular chemistry. 9,10-Dichloroanthracene also reacts with hydrochloric acid to produce hydrogen chloride gas and fluoresces under ultraviolet radiation or when exposed to longwave ultraviolet light. 9,10-Dichloroanthracene crystallizes as white needles that melt at 169 °C and boil at 291 °C.