Salts (including hydroxides) containing an atom of tetracoordinate antimony, of the form
[R4Sb]+X−.
See: onium compounds
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1367 (https://doi.org/10.1351/pac199567081307)