Ammonium and caesium carbonate peroxosolvates: supra­molecular networks formed by hydrogen bonds

Diammonium carbonate hydrogen peroxide monosolvate, (I), and dicaesium carbonate hydrogen peroxide tris­olvate, (II), were crystallized from 98% hydrogen peroxide. The peroxide mol­ecules in both (I) and (II) act as donors in only two hydrogen bonds with carbonate anions.