The Simultaneous Presence of Different Varieties of Intermolecular Hydrogen Bonds in a New Layer-Type Anionic Host Lattice Built of Thiourea,Fumaric Acid and Fumarate Anion

A new inclusion complex (n-C₄H₉)₄N⁺C₄H₃O ₄ ^?  · C₄H₄O₄ · (NH₂)₂CS has been prepared and characterized by X-ray crystallography. Crystal data: space group P \( \overline 1 \), a = 8.799(2) Å, b = 9.590(1) Å, c = 18.684(4) Å, α = 89.63(1)°, β = 79.56(1)°, γ = 79.74(1)°, V = 1525.2(5) ų, Z = 2, R ₁ = 0.0562 and wR = 0.1033. In the title compound, thiourea molecules, fumaric acid and fumarate anions are joined together by typical O–H···O, N–H···O and N–H···S, plus weak C–H···O and C–H···S, hydrogen bonds to generate a hydrogen-bonded layer corresponding to the (100) family of planes. The tetra-n-butylammonium cations are orderly arranged in a sandwich-like packing mode between the stacked layers. The simultaneous presence of different varieties of intermolecular hydrogen bonds is an interesting feature of the title compound.