Palladium(II)/beta-diketonate complexes containing the enolates of N-acetyl-3-acyltetramic acids - Crystal structure of the Lewis base adduct, [Pd(py)(4)](abta)(2)

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Palladium(II)/beta-diketonate complexes containing the enolates of N-acetyl-3-acyltetramic acids - Crystal structure of the Lewis base adduct, [Pd(py)(4)](abta)(2) (EN)

Gavrielatos, E (EN)
Bickley, JF (EN)
Markopoulos, J (EN)
Steiner, A (EN)
Igglessi-Markopoulou, O (EN)
Athanasellis, G (EN)
Heaton, BT (EN)

journalArticle (EN)

2014-03-01T01:53:09Z
2003 (EN)


Progressive displacement of acac from [Pd(acac)(2)] occurs on reaction with different tetramic acids (HL = Hata, Habta) to give [Pd(acac)(eta(2)-L)] and [Pd(eta(2)-L)(2)] but, when HL = Haceta, only [Pd(acac)(eta(2)-L)] is formed, even when the ratio of Pd-HL is 1:4; reaction of all these tetramic acids with an aqueous solution of K-2[PdCl4] gives [Pd(eta(2)-L)(2)]. In solution, NMR studies in non polar solvents show that there is only one isomer of [Pd(acac)(eta(2)-L)] whereas there are usually two isomers of [Pd(eta(2)-L)(2)] which are probably due to the presence of cis- and trans-isomers of the complex as a result of both the enolate ligands adopting a 0,O'-mode of coordination via the functionalities associated with C-4 and the acyl group at C-3 in the pyrrolidine ring. In pyridine solution, [pd(eta(2)-abta)(2)] forms a Lewis base adduct, [Pd(py)(4)](abta)(2), which has been characterised by X-ray analysis and shown to contain a square-planar Pd(py)(4)-group with trans-, monodentate, weakly bonded abta groups. (C) 2003 Elsevier B.V. All rights reserved. (EN)

Chemistry, Inorganic & Nuclear (EN)

tautomerism (EN)
palladium (EN)
NMR spectroscopy (EN)
beta-diketonates (EN)
O ligands (EN)

INORGANICA CHIMICA ACTA (EN)

Αγγλική γλώσσα

ELSEVIER SCIENCE SA (EN)




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