Non-merohedrally Twinned Catena-[Dibromido-μ-4,4’-Dithiodipyridine-κ2 N:N’-Zinc(II)]

The crystal structure of [ZnBr2(μ-dtdp)]n (1) (dtdp = 4,4’-dithiodipyridine) is described. Compound 1 is a one-dimensional coordination polymer of the arched chain type, composed of ZnBr2 units as tetrahedral metal nodes joined by the bent bridging ligand dtdp. 1 was found to crystallise in the monoclinic space group C2/c with the lattice parameters a = 12.713(4) A, b = 10.108(4) A, c = 10.835(5) A, β = 91.21(3)°, V = 1392.0(9) A3. In the crystal, the coordination polymer strands run parallel to the c axis direction with the ZnBr2 units and disulfide bridges containing crystallographic twofold rotation axes. The structure of 1 belongs to an isomorphous series of [ZnX 2(μ-dtdp)]n (X = Cl−, SCN−, CH3COO−) coordination polymers, which can be found in the literature. The crystal of 1 studied was found to be a two component non-merohedral twin with the twin operation representing a twofold rotation about the c axis, as for the isostructural chlorido derivative [Seidel RW, Dietz C, Oppel IM (2012) Z Kristallogr NCS 227:305]. The crystal structure of the one-dimensional coordination polymer [ZnBr2(μ-dtdp)]n (dtdp = 4,4’-dithiodipyridine) has been determined from a non-merohedrally twinned crystal .