Palladium(II)–rare-earth metal(III) paddlewheel carboxylate complexes: Easy total acetate to pivalate metathesis |
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Authors: | Sergei E Nefedov Natalia Yu KozitsynaMichael N Vargaftik Ilya I Moiseev |
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Institution: | N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation |
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Abstract: | Bis-paddlewheel heterobimetallic complexes in which palladium(II) is connected to the rare-earth metals(III) Pd(μ-OOCMe)4Ln(OH2)(μ,η2-OOCMe)]2 × 2HOOCMe (Ln = Nd, Sm, Eu, Yb and Tm) by four acetate bridges were synthesised by the reaction of Pd3(μ-OOCMe)6 with the LnIII acetates. The tetraacetate-bridged complexes were unexpectedly found to be readily transformed by the stoichiometric amount of pivalic acid into the mono-paddlewheel tetrapivalate-bridged analogues in which the paddlewheel structure Pd(μ-OOCR)4Ln] maintains as established by X-ray crystallography. The role of the intra- and intermolecular H-bonding in these complexes is discussed. |
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Keywords: | Palladium carboxylates Rare-earth metals Heterometallic paddlewheel complexes X-ray structure H-bonding |
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