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Crystal Structure of lead(II) Acetylacetonate and the Structure of the Acetylacetone Solvated lead(II) Ion in Solution Studied by Large-Angle X-ray Scattering

Crystal Structure of lead(II) Acetylacetonate and the Structure of the Acetylacetone Solvated lead(II) Ion in Solution Studied by Large-Angle X-ray Scattering

Krzysztof Lyczko, Jerzy Narbutt, Beata Paluchowska, Jan K Maurin, Ingmar Persson

Dalton Trans. 2006 Sep 7;(33):3972-6.

PMID: 17028705

Abstract:

The crystal structure of bis(acetylacetonato)lead(II) and the structure of the acetylacetone solvated lead(II) ion in solution have been determined by single-crystal X-ray diffraction and large-angle X-ray scattering (LAXS), respectively. The acetylacetone is deprotonated and acts as a bidentate anionic ligand (acac-) in the solid Pb(acac)2 compound. The lead(II) ion binds four oxygen atoms strongly in a nearly flat pyramidal configuration with Pb-O bond lengths in the range 2.32-2.37 A, and additionally three oxygens from neighboring complexes at 3.01-3.26 A. Acetylacetone acts as a solvent (Hacac) at dissolution of lead(II) trifluoromethanesulfonate forming a pentasolvate with a mean Pb-O bond distance of 2.724(5) A. The 6s2 lone electron pair on the lead(II) ion becomes stereochemically active in the crystalline acetylacetonate complex, while it is inactive in the solvate in solution. The solution was also analysed using IR and 1H NMR spectroscopy.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP15282889	Lead(II) acetylacetonate		15282-88-9	Price

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