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
Source:
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1341