Syntheses and crystal structures of two new nickel 1,2,5-thiadiazole-3, 4-dithiolate complexes as benzylpyridinium salts

Two new complexes, [BrBzPy]2[Ni(tdas)2] (1) and [BrFBzPy]2[Ni(tdas)2] (2), have been prepared by reaction of disodium 1,2,5-thiadiazole-3,4-dithiolate (Na2tdas), NiCl2·6H2O and 1-(4′-bromobenzyl) pyridinium bromide (BrBzPyBr) or 1-(4′-bromo-2′-fluorobenzyl)pyridinium) bromide (BrFBzPyBr). Crystallographic data for 1: monoclinic, P21 /c, a = 11.333(1), b = 12.602(1), c = 12.267(1) Å, β = 115.65(1)°, V = 1579.4(18) Å3, Z = 4. Data for 2: triclinic, , a = 7.437(2), b = 10.382(2), c = 11.330(2) Å, α = 110.07(3), β = 92.58(3), γ = 93.32(3)°, V = 818.5(2) Å3, Z = 1. In the complexes, the [Ni(tdas)2]2− anion exhibits a quasi-planar structure. The topology of the countercation results in different stacks of molecules in the complexes.

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