A Novel 3D Platinum–Thallium Coordination Polymer having Strong Metal–Metal Interactions

A new three-dimensional platinum(II)–thallium(I) coordination polymer [{Pt(pda)(NHCOtBu)2}4Tl4][Pt(CN)4]2·2H2O (pda = 1,2-propyldiamine) has been prepared from the direct reaction of [Tl2Pt(CN)4] and [Pt(pda)(NHCOtBu)2] in water, and its structure was characterized by X-ray diffraction analysis. The compound crystallizes in monoclinic, space group Pn, a = 11.567(2) Å, b = 11.570(2) Å, c = 37.677(8)Å, β = 94.64(3)°, V = 5025.8(17) Å3, Z = 2, R1 = 0.0679 and wR2 = 0.1574 [I >  2σ (I)], Goodness-of-fit on F2 = 1.055. The compound exhibits a novel 3D network structure consisting of [Pt(CN)4]2− connected 1D infinite Pt–Tl–Pt–Tl chains via strong Pt–Tl bonds.