hydrazo compounds

Compounds containing the divalent hydrazo group, –NHNH–, such as hydrazoarenes (1,2-diarylhydrazines or 1,2-diaryldiazanes, usually with both aryl groups the same) and their N-substituted derivatives ArNRNRAr.
See also: hydrazines
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1341 (https://doi.org/10.1351/pac199567081307)