The first two examples of halogen bonding with a sigma hole-donating fluorine in the Csp3-FOsp3 interaction from polyfluorinated trans-dihalo-palladium(ii) di-substituted pyridine complexes

The first two examples of halogen bonding in the Csp3-FOsp3 interaction have been both experimentally and theoretically proved for trans-[PdX2(3-HCF2CF2CH2OCH2py)2] complexes where X = Cl and Br. Both metal complexes with a Csp3-FOsp3 halogen bond have a σ hole donating fluorine.

trans-Bis(pyridine-κN)bis(thiocyanato-κS)palladium(II)

In the title complex, [Pd(SCN)2(C5H4N)2], the PdIIion has atrans-N2S2square-planar coordination sphere defined by two pyridine ligands and two S-bound SCN−anions. The PdIIcation lies on an inversion centre, thus the asymmetric unit contains one half of the complex, the PdN2S2moiety is exactly planar and the two pyridine rings are parallel. In the crystal, the complex molecules are stacked in columns along thea-axis direction.

The crystal structure of trans-dibromido-bis(pyridine-κN)platinum(II), C10H10Br2N2Pt

C10H10Br2N2Pt, triclinic, P1̄ (no. 2), a = 5.6590(9) Å, b = 7.0204(12) Å, c = 7.7623(11) Å, α = 79.262(5)°, β = 84.603(4)°, γ = 88.928(5)°, V = 301.64(8) Å3, Z = 1, Rgt(F) = 0.0440, wRref(F2) = 0.0946, T = 223 K.

Crystal structure of cis-tetrabromidobis(pyridine-κN)platinum(IV), C10H10Br4N2Pt

C10H10Br4N2Pt, monoclinic, P21/c (no. 14), a = 8.0172(4) Å, b = 13.1989(7) Å, c = 13.8836(8) Å, β = 95.995(3)°, V = 1461.10(14) Å3, Z = 4, R gt(F) = 0.0477, wR ref(F 2) = 0.1189, T = 223(2) K.