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Closed Access item Synthesis and solution behavior of the trinuclear palladium(II) unsaturated carboxylate complexes triangle-Pd3[μ-O2CC(R′) = CHMe]6 (R′ = Me, H): X-ray structure of palladium(II) tiglate (R′ = Me)

Authors:Stromnova, Tatiana A.
Monakhov, Kirill Yu.
Cámpora, Juan
Palma Ramírez, Pilar
Carmona Guzmán, Ernesto
Álvarez, Eleuterio
Keywords:Palladium, Carboxylate complexes, Unsaturated acids, Tiglic, Crotonic acids, Tiglate, Crotonate ligands
Issue Date:7-Jun-2007
Citation:Inorganica Chimica Acta 360(15): 4111-4116 (2007)
Abstract:The first examples of binary palladium(II) derivatives of unsaturated carboxylic acids are reported. It was found that the interaction of Pd3(μ-OAc)6 with the α,β-unsaturated 1-methylcrotonic (tiglic) and crotonic acids leads to the corresponding carboxylates of composition Pd3[μ-O2CC(R′) = CHMe]6, where R′ = Me (1) or H (2). The new compounds have been characterized by elemental analysis, solid and solution IR, 1H and 13C NMR, and ESI mass spectrometry. The crystal structure of 1 has been determined. This molecule displays a central Pd3 cyclic core with Pd–Pd distances of 3.093–3.171 Å. Each Pd–Pd bond is bridged by a pair of carboxylate ligands, one above and the other below the Pd3 plane, providing a square planar coordination for each Pd atom in an approximate D3h overall symmetry arrangement. Solution spectroscopic data show that the bridging η1:η1:μ2 interaction of the carboxylates of 1 and 2 is readily displaced, with a change of the ligand to the terminal (η1) coordination mode.
Description:6 páginas, 4 figuras, 2 tablas, esquemas
Publisher version (URL):http://dx.doi.org/10.1016/j.ica.2007.05.058
Appears in Collections:(IIQ) Artículos

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