catena-Poly[[[(2,2′-bipyridine-κ(2) N,N′)(dimethyl sulfoxide-κO)(nitrato-κ(2) O,O′)bis­muth(III)]-μ-5-carb­oxy­benzene-1,3-dicarboxyl­ato-κ(4) O (1) ,O (1′) :O (3) ,O (3′)] dimethyl sulfoxide monosolvate]

The polymeric title compound, {[Bi(C(9)H(4)O(6))(NO(3))(C(10)H(8)N(2))(C(2)H(6)OS)]·C(2)H(6)OS}(n), was obtained by the reaction of bis­muth(III) nitrate, bipyridine (bpy) and 1,3,5-benzene­tricarb­oxy­lic acid (H(3)BTC). The Bi(III) ion is coordinated in a distorted tricapped trigonal-prismatic geometry, defined by two N atoms of the bipy ligand, four O atoms of two HBTC(2−) anions, two O atoms of a nitrate anion and one O atom of a dimethyl sulfoxide ligand. The crystal packing is stabilized by O—H⋯O and C—H⋯O hydrogen bonds. The S atom of the non-coordinating dimethyl sulfoxide mol­ecule is disordered over two sets of sites with refined site-occupancies of 0.430 (19) and 0.570 (19).