| Abstract: | The reaction of anhydrous CuCl2 with HCl and 2-amino-5-iodopyridine in 1-propanol resulted in two polymorphs of (5-IAP)2[CuCl4] [5-IAP = 2-amino-5-iodopyridinium], one as red rods (1) and one as orange prisms (2). The two polymorphs have been characterized by single crystal x-ray diffraction and variable temperature magnetic susceptibility. Crystal data: triclinic, P-1, F(000) = 606, MoK α (λ = 0.71073 Å): for (1): a = 9.248(6), b = 10.202(7), c = 10.368(7) Å, α = 102.451(9), β = 96.662(8), γ = 96.725(8)°, V = 938.4(11) Åsup3;, Z = 2, Dcalc = 2.291 Mg/m3, μ = 5.020 mm?1, R = 0.0392 for [|I|≥2σ(I)]. For (2): a = 8.966(2), b = 10.755(2), c = 11.359(2) Å, α = 89.63(3), β = 68.04(3), γ = 69.07(3)°, V = 938.6(3) Åsup3;, Z = 2, D calc = 2.291 Mg/m3 , μ = 5.019 mm?1 , R = 0.0217 for [|I|≥2σ(I)]. The crystal packing for both polymorphs suggests that their magnetic behavior should be that of weakly interacting alternating linear chains. Temperature dependent susceptibility measurements yield: for 1 , C = 0.43, g = 2.14, θ = m 1.98; for 2, C = 0.45, g = 2.19, θ = ?4.15. |
