Bromide Complexes of Sb(III) with the 4,4'-Dimethyl-1,1'-Butanediylbis(pyridinium) Cation: Unexpected Formation of Polymorphs with Complex Cations of Various Nuclearity

摘要

The reaction of solutions of Sb2O3 and 4,4'-dimethyl-1,1'-butanediylbis(pyridinium) dibromide ((4-MePyC4)Br-2) in concentrated HBr affords polymorphs: binuclear (4-MePyC2)Sb2Br8 (I) or tetranuclear (4-MePyC4)(2)Sb4Br16 (II) complexes, depending on the reaction conditions. The structures of the complexes are studied by X-ray structure analysis (CIF files CCDC nos. 2061368 (I) and 2061369 (II)).