Synthesis and structure of the mercury chloride complex of 2,2′-(2-bromo-5-tert-butyl-1,3-phenyl­ene)bis­(1-methyl-1H-benzimidazole)

In the title mercury complex, catena-poly[[di­chlorido­mercury(II)]-μ-2,2′-(2-bromo-5-tert-butyl-1,3-phenyl­ene)bis­(1-methyl-1H-benzimidazole)-κ(2) N (3):N (3′)], [HgCl(2)(C(26)H(25)BrN(4))](n), the Hg(II) atom is coordinated by two Cl atoms and by two N atoms from two 2,2′-(2-bromo-5-tert-butyl-1,3-phenyl­ene)bis­(1-methyl-1H-benzimidazole) ligands. The metal cation adopts a distorted tetrahedral coordination geometry with with bond angles around mercury of 100.59 (15)° [N—Hg—N] and 126.35 (7)° [Cl—Hg—Cl]. This arrangement gives rise to a zigzag helical 1-D polymer propagating along the b-axis direction.