Related compounds include the antimonide chlorides, antimonide iodides, arsenide chlorides, arsenide bromides, arsenide iodides, phosphide chlorides, phosphide bromides, and phosphide iodides.
[1] The bromoantimonates have antimony in positive oxidation states.
The antimony can be linked into chains, in which case it has a formal oxidation state of −1.
Alternately it can be in pairs as Sb2, with an oxidation state of −2 for each atom.
[2] Many of these compounds are clathrates, whereby there are two interpenetrating structures that are only weakly bound to each other by van der Waals force.