X-ray structural analysis of a novel organic metal (BEDT-TTF)4[Hg2Cl6]·PhCl
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X-ray structural analysis has revealed that reaction of (BEDT-TTF)[HgCl3]− with PhCl leads to the formation of a cation-radical salt (BEDT-TTF)4[Hg2Cl6]· PhCl, which exhibits a laminar crystal structure. The cationic layer is characterized by a grid or lattice network of contracted S...S intermolecular distances (3.396(4)–3.647(5) Å), which unite the BEDT-TTF cations in ribbons or bands, parallel to the  direction, and which also bind the ribbons together in a direction close to the  axis. The presence of this type of lattice network explains the metallic nature of the conductivity of this salt (BEDT-TTF)4Hg2Cl6]·PhCl in the temperature range 300.0–1.5 K, and is the basis of assigning this salt to a new class of organic, two-dimensional conductors. The [Hg2Cl6]2− anions and PhCl solvent molecules are united via secondary Hg...Cl 3.176(5) Å and Cl...Cl 3.480(6) Å interaction forces to form centrosymmetric tetramers [Hg2Cl6PhCl]24−, stretched out along the  axis direction.
KeywordsCrystal Structure Structural Analysis Axis Direction Solvent Molecule Interaction Force
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