W6Cl18: Neue Synthesen,neue Strukturverfeinerung,elektronische Struktur und Magnetismus

W₆Cl₁₈: New Syntheses, New Structure Refinement, Electronic Structure, and Magnetism Pure W₆Cl₁₈ was synthesized after two methods, by oxidizing W₆Cl₁₂ with CCl₄ in an autoclave, and by reaction of W₆Cl₁₂ in a chlorine gas flow. At temperatures above 400 °C and under atmospheric pressure W₆Cl₁₈ transforms into W₆Cl₁₂. The crystal structure of W₆Cl₁₈ was refined after the Rietveld method on X‐ray powder data. The unusual electronic conditions of the 18 electron cluster W₆Cl₁₂]Cl₆ are compared with those of the electron‐precise 24 electron cluster W₆Cl₈]Cl₄. The compound exhibits paramagnetic behaviour with two electrons in antibonding energy levels.