Series of Two‐Dimensional Hofmann‐DMF‐Type Compounds M(DMF)2M′(CN)4 (M = Cd, Fe; M′ = Ni, Pd, Pt): Syntheses, Structures, and Thermal Stabilities

Abstract

AbstractFive two‐dimensional Hofmann‐DMF‐type compounds M(DMF)2M′(CN)4 [M = Cd, M′ = Ni (1), Pd (2), Pt (3); M = Fe, M′ = Ni (4), Pt (5)] were synthesized by solution diffusion method. X‐ray diffraction analysis revealed that compounds 1–5 are isomorphous and crystallize in the monoclinic C2/m space group. The structure consists of corrugated cyanide‐bridged polymeric networks, in which the DMF‐ligated octahedral M and square‐planar M′ atoms occupy special positions of the 2/m site symmetry. In addition, the non‐hydrogen atoms of DMF molecules locate on a crystallographic mirror plane and coordinate to the axial sites of M atoms from both sides of the sheets. Thermal stabilities of such system are associated with the metal ions involved in structures and the host framework begins to collapse with the loss of coordinated DMF molecules.