cyclosilazanes

https://doi.org/10.1351/goldbook.C01507
Compounds having rings of alternating silicon and nitrogen atoms:
C01507.png
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1330 (https://doi.org/10.1351/pac199567081307)