Reactivity of neodymium(III) Isopropoxide derivatives: synthesis, characterization and crystal structure of [Nd4(μ3-OH)2(μ2,μ1-acac)6(acac)4]

Add time:07/31/2019    Source:sciencedirect.com

Reaction between neodymium chips and isopropanol led to the isolation of [Nd(OiPr)3]4·4iPrOH. Its desolvation results in a soluble polynuclear neodymium(III) oxoisopropoxide, whose reactivity has been investigated. Reaction with acetylacetone produced a compound analysing as Nd2(OH)(acac)5, which has been characterized by IR and ESR spectroscopy, as well as by X-ray diffraction. It crystallizes in the monoclinic P 21/n system with unit cell dimensions α = 14.52(5), b = 14.20(4), c = 15.25(5) Å, β = 101.4° and Z = 4. Least-squares refinement converged to a final Rw = 0.050. The molecule is a centrosymmetric, tetranuclear neodymium(III) hydroxo acetylacetonate cluster, [Nd4(μ3-OH)2(μ2,μ1-acac)6(acac)4]. Two dinuclear Nd2(OH)(acac)5 units are linked by two triply bridging pyramidal μ-hydroxo ligands and by two bridging-chelating β-diketonate ligands. The metal atoms are eight-coordinated with a distorted square antiprism geometry.

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