Structure and Luminescent Properties of Cluster Complexes with the {Mo6(μ3-SeCl7)}3+ Core

Abstract

The selenium atom substitution for one of the capping chloride ligands in [Mo₆(μ₃-Cl₈)Cl₆]^2– under the action of H₂Se in situ results in a [Mo₆(μ₃-SeCl₇)Cl₆]^3– cluster which is isolated and structurally characterized in the form of (Bu₄N)₃[Mo₆(μ₃-SeCl₇)Cl₆] (I). In the acetonitrile solution the complex exhibits luminescence (λ_max = 775 nm, τ_em = 1.8 μs, Φ_em = 0.004). When the solution of I in acetonitrile is heated, a partial solvolysis product of the composition (Bu₄N)₂[Mo₆(μ₃-SeCl₇)Cl₅(CH₃CN)] (II) is isolated and structurally characterized.